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The European shores of the Mediterranean are characterised by well-known sociocultural and economic dynamics during the Bronze and Early Iron Ages (2200–550 BC), but our understanding of the African shores is comparatively vague. Here, the authors present results from excavations at Kach Kouch, Morocco, revealing an occupation phase from 2200–2000 cal BC, followed by a stable settlement from c. 1300–600 BC characterised by wattle and daub architecture, a farming economy, distinctive cultural practices and extensive connections. Kach Kouch underscores the agency of local communities, challenging the notion of north-western Africa as terra nullius prior to Phoenician arrival.
This report presents the first in-depth publication of preliminary data from Oued Beht, northwest Morocco, a remarkable site initially identified in the 1930s and now newly investigated. It is based on fieldwork undertaken in 2021–2022 (photogrammetry, survey and excavation), and associated study and analyses. Oued Beht is shown to be a large site of ca. 9–10 hectares in main extent, with many deep pits and convincing evidence for a full package of domesticated crops and animals. Its material culture is abundant and dense, comprising ceramics (including a local painted tradition hitherto barely attested in northwest Africa but comparable to finds in Iberia), numerous polished stone axes, grinding stones and other macrolithics, and a chipped-stone industry. Radiocarbon dates so far cluster at ca. 3400–2900 BC, but there are also indications of earlier and later prehistoric activity. What social activities Oued Beht reflects remains open to interpretation, but it emerges as a phenomenon of strong comparative interest for understanding the wider dynamics of north Africa and the Mediterranean during the fourth and third millennia BC.
In recent decades, there has been extensive research on the association between Autism Spectrum Disorders (ASD) and Eating Disorders (ED), as well as the existence of sensory sensitivity alterations in both diagnostic groups.
Objectives
The present study aimed to examine the presence of autistic traits in a sample of adult women diagnosed with different ED, and the concurrent role of autistic traits and sensory sensitivity in both their eating disorder symptomatology and their autism-related eating behaviours.
Methods
Seventy-five women with different ED completed the Eating Attitude Test (EAT-26), the Autism Quotient (AQ), the Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R), the Sensory Perception Quotient - Short Form 35 item (SPQ-SF35) and the Swedish Eating Assessment for Autism Spectrum Disorders (SWEAA), which investigates specific eating behaviour related to autism.
Results
12% of the sample scored above the cut-off at both the AQ and the RAADS-R, while 68% scored above the cut-off at the RAADS-R only. We found an association between: i) hypersensitivity in the taste domain and ED severity and autistic-like eating behaviours; ii) hypersensitivity in the vision domain and autistic-like eating behaviours; iii) higher autistic traits and ED severity and autistic-like eating behaviours.
Conclusions
This study confirms the presence of autistic traits in patients with ED and underscores the significance of conducting additional systematical investigations on this topic across all diagnostic categories of ED. It is becoming progressively evident that identifying and measuring the levels of autistic traits in patients with ASD is crucial not only for a better understanding of the causes of these disorders, but also because it would help to tailor specific therapeutic interventions, especially considering the cognitive flexibility issues presented by these patients and the socio-emotional challenges they face. Additionally, this study has laid the foundation for further insights into the relationship between sensory sensitivity and dysfunctional eating behaviours typical of ED and ASD.
Neurofilmology is a young and evolving research field, at the intersection between neuroscience and movie experiences, that explores how the brain processes and responds to visual storytelling. It involves examining the cognitive and emotional effects of movies on viewers, including social cognition and perspective-taking aspects. However, up to date, these studies have focused only on the neurotypical population, hence constituting a considerable gap in the literature with respect to individuals with neuroatypical functioning.
Objectives
Aim of this study was to investigate the experience of film viewing and its correlates in individuals with a diagnosis of Autism Spectrum Disorders (ASD).
Methods
30 neurotypical individuals and 30 individuals with ASD without intellectual disabilities were asked to observe 12 short video clips of 3 seconds length, showing an agent grasping an object from a table, and filmed with three different camera techniques: Still, Steadycam, Zoom; for each clip, they were asked to respond to six question on a Visual Analogue Scale (0-100) designed to investigate participants’ potential feeling of involvement with the observed scene, their comfort with the different filming conditions, and their estimation of the ecological plausibility of the different types of camera movements.
Results
Participants felt more involved watching videos filmed with a Steadycam, with respect to the Zoom and Still condition. Within the neurotypical group participants felt more comfortable when the camera was in motion (both Steadycam and Zoom condition) compared to the Still condition; no differences were found between conditions in the ASD group, as if they felt equally comfortable in every condition administered, regardless the filming technique.
Conclusions
First, our results reinforce prior findings regarding the influence of different camera techniques on neurotypical individuals. Second, they add to the existing literature suggesting that individuals with ASD may exhibit differences in their subjective experiences related to empathizing with characters and immersing themselves as actors when the camera replicates naturalistic movements, resulting in a diminished overall fulfillment in the movie-watching process.
Data compilations expand the scope of research; however, data citation practice lags behind advances in data use. It remains uncommon for data users to credit data producers in professionally meaningful ways. In paleontology, databases like the Paleobiology Database (PBDB) enable assessment of patterns and processes spanning millions of years, up to global scale. The status quo for data citation creates an imbalance wherein publications drawing data from the PBDB receive significantly more citations (median: 4.3 ± 3.5 citations/year) than the publications producing the data (1.4 ± 1.3 citations/year). By accounting for data reuse where citations were neglected, the projected citation rate for data-provisioning publications approached parity (4.2 ± 2.2 citations/year) and the impact factor of paleontological journals (n = 55) increased by an average of 13.4% (maximum increase = 57.8%) in 2019. Without rebalancing the distribution of scientific credit, emerging “big data” research in paleontology—and science in general—is at risk of undercutting itself through a systematic devaluation of the work that is foundational to the discipline.
Most stromatolites are built by photosynthetic organisms, for which sunlight is a driving factor. We examine stromatolite morphogenesis with modelling that incorporates the growth rate of cyanobacteria (the dominant stromatolite-builder today, and presumably through much of the past), as a function of the amount of irradiance received. This function is known to be non-monotonic, with a maximum beyond which growth rate decreases. We define optimal irradiance as that which generates maximal growth, and we find fundamentally different morphologies are predicted under suboptimal and superoptimal direct irradiance. When the direct irradiance is suboptimal, narrow widely spaced columns are predicted, with sharp apices resembling conical stromatolites. When it is superoptimal, broad, closely spaced, flattened domical forms appear. Such disparate morphologies could also occur as a result of other vector-flux-dependent growth factors (e.g. currents). A differential equation is developed that describes the rate of change of the radius of curvature R at the apex of a growing stromatolite column, allowing simple simulations of the time evolution of R for model stromatolites. The term photomorphism is proposed to describe the disparate morphologies that may arise due to the effects described here (and photomorphogenesis as the process). Model results appear to explain, at least qualitatively, the morphologies of a number of stromatolites. If stromatolites are encountered on Mars, our model suggests that they are quite likely to be conical in form, owing to likely suboptimal irradiance since Mars has always received less irradiance than Earth.
Disasters often occur without any warning and may result in mass casualties that can overwhelm the capacity of local and regional healthcare systems. The etiology of disasters can be man-made or natural, can be localized or effect a large geographic area, and can result in minimal harm to the population or mass casualties. The most lethal natural disasters include earthquakes, hurricanes, floods, tsunamis, snowstorms, and fires. Man-made disasters include wars, building collapses, mine cave-ins, chemical and biological exposures, nuclear accidents, and civil unrest.
In São Paulo, Brazil, the first case of coronavirus disease 2019 (CoViD-19) was confirmed on 26 February, the first death due to CoViD-19 was registered on 16 March, and on 24 March, São Paulo implemented the isolation of persons in non-essential activities. A mathematical model was formulated based on non-linear ordinary differential equations considering young (60 years old or less) and elder (60 years old or more) subpopulations, aiming to describe the introduction and dissemination of the new coronavirus in São Paulo. This deterministic model used the data collected from São Paulo to estimate the model parameters, obtaining R0 = 6.8 for the basic reproduction number. The model also allowed to estimate that 50% of the population of São Paulo was in isolation, which permitted to describe the current epidemiological status. The goal of isolation implemented in São Paulo to control the rapid increase of the new coronavirus epidemic was partially succeeded, concluding that if isolation of at least 80% of the population had been implemented, the collapse in the health care system could be avoided. Nevertheless, the isolated persons must be released one day. Based on this model, we studied the potential epidemiological scenarios of release by varying the proportions of the release of young and elder persons. We also evaluated three different strategies of release: All isolated persons are released simultaneously, two and three releases divided in equal proportions. The better scenarios occurred when young persons are released, but maintaining elder persons isolated for a while. When compared with the epidemic without isolation, all strategies of release did not attain the goal of reducing substantially the number of hospitalisations due to severe CoViD-19. Hence, we concluded that the best decision must be postponing the beginning of the release.
Prostate and breast cancer share many similarities: high lifetime prevalence, increasing frequency, role of environmental factors, long survival also in metastatic disease and possibility of screening. The aim of this work is to evaluate the characteristics related to the patients, disease and treatment which can affect HRQoL at the beginning and after radiotherapy.
Methods
since June 2009, we have recruited patients, providing informed consent, before radiotherapy (T0). We assess demographic characteristic (age, qualification, work, marital status…); neoplastic staging and grading; radiation dose and other antineoplastic treatment (hormonal/chemio-therapy or surgery); concomitant medical disease and pharmacological therapy. We evaluate HRQoL by EORTC-QLQ-C30 and EORTC-QLQ-PR25 (prostate-specific) or EORTC-QLQ-BR23 (breast-specific). The protocol also includes HADS, Paykel Life Events Scale and EPQ-R. The work is ongoing and implies a follow-up at 6 and 12 months (T1/T2).
Results
The majority of men have a localized disease with Gleason score between 6 and 8 and the median pretreatment PSA is 10.52 ng/mL; 70% will undergo adjuvant-RT; median age is 69.30 years. Women have a median age of 58.46 years, all underwent surgery and all have a localized disease and positive receptorial status. Global QoL is lightly higher in the man sample; both groups report a major deficit at Emotional Function and high levels of Fatigue. The personological characteristic more represented is “Extravertion”.
Conclusions
The results show an association between worse QoL, “Nevroticism” and high Anxiety levels only in the men sample at T0. At the moment, there is no significant relation in the women sample.
To evaluate the subjective well-being of a group of patients who were hospitalized at the Institute of Psychiatry (Novara), compared to the severity of illness.
Methods
Patients are evaluated at admission and discharge through self-administration of the SWN (Subjective Well-being under Neuroleptics) scale, which contains five subscales (emotional regulation; self-control; mental functioning; social integration and physical functioning) assessing patients’ psychophysical and emotional well-being, calculating a value for each subscale and a total score. The clinician fills in the CGI (Clinical Global Impression) for each patient, which provides a global judgement in three areas: severity of illness, global improvement and therapeutic effectiveness.
Results
From June 2009, 51 patients were evaluated at admission and discharge: 26 diagnosed with psychosis and 25 diagnosed with personality disorders. Preliminary data suggest a meaningful improvement of the physical functioning in the psychotic group, a tendency to improvement of the social integration area in the personality disorders group. Among the psychotic group, the schizophrenic patients (n°=14) have shown an improvement in the self-control subscale.
Conclusions
Literature suggests that a high SWN score is associated with a better compliance and an early improvement of subjective well-being is a major predictor of the chance of remission. This study will allow to compare the subjective well-being evaluated by SWN with the clinical judgment of the CGI and above all if this can represent a predictor index for the compliance and the chance of remission.
DD represents a common issue in clinical practice, with relevant effects on symptoms, course and treatment of disease. It's often associated with negative outcome as a greater severity of symptoms and resistance to drug treatment.
Objectives
To assess how the characteristics (sociodemographic, clinical and related to substance abuse) of patients discharged with DD have changed taking into account the FA occurred in three different five-year periods (1990–1994, 2000–2004, 2005–2009). We also compared the characteristics of patients discharged with only psychiatric diagnosis with those of patients with DD to look for possible risk factors for abuse among people with psychiatric illness.
Methods
We conducted a retrospective study of medical records of patients at FA to our Institute in three different periods. We divided the patients discharged with DD from those discharged with only psychiatric diagnosis.
Results
Among the FA occurred in the periods examined we noticed an increase of DD cases (12% from 1990 to 1994, 21% 2000–2004, 28% 2005–2009). The incidence of each diagnosis was changed in several years, but each time the diseases more represented remain schizophrenic or affective psychosis and personality disorders. Alcohol is the most widely used psychotropic drug in each period. There is also a progressive increase in the abuse of cannabis, cocaine and in the incidence of multi-drug abusers. Compared with patients discharged with only a psychiatric diagnosis, patients with DD were more frequently:male, younger, unmarried, unemployed, with legal issues, grown up in a family with serious problems, and history of etero-aggressive episodes.
Conclusions
Due to continued increase in cases of DD, we want to highlight the importance of early identification of cases of comorbidity in order to provide adequate treatment and support.
Axis I anxiety disorders are often comorbid in psychoses and mostly assessed during the hospitalization. In the present study anxiety comorbidity was investigated in 98 patients (with schizophrenia, schizoaffective disorder, bipolar disorder with psychotic features) previously hospitalized for psychotic symptoms.
Methods:
Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorder Fourth Edition (SCID-P), Brief Psychiatric Rating Scale (BPRS) and Clinical Global Impressions Scale (CGI), were performed during hospitalization (t0) and subsequently in a phase of clinical remission, lasting for at least 6 months besides a stable pharmacological treatment for at least 3 months (t1). Comorbid anxiety disorders were assessed only at t1 in order to avoid the influence of an acute clinical state.
Results:
Our sample confirmed that anxiety comorbidity is a relevant phenomenon in psychoses, being present in nearly half of the patients (46.9%). Our specific prevalences were: obsessive-compulsive disorder (OCD) 20.4%, panic disorder (PD) 24.5%, social anxiety disorder (SAD) 19.4%, generalized anxiety disorder (GAD) 2%, post-traumatic stress disorder (PTSD) 0%. In our sample, patients with schizophrenia had a rate of anxiety disorders (73.9%) significantly higher (p<.05) than those with schizoaffective disorder (31.6%) or bipolar disorder (41.1%). Patients with PD or with OCD showed higher severity of illness only at t0; on the contrary, those with SAD demonstrated greater severity at t1.
Conclusions:
PD, OCD and SAD resulted frequently comorbid in psychotic patients; SAD more prevalent in schizophrenia with a negative impact on the course of the illness.
To assess the use of SWN in the acute phase of psychiatric disease as a predictor of clinical outcome.
Methods
This study started in June 2009 and at the moment we have recruited 150 patients. The patients were divided into 4 groups according to their psychiatric diagnosis (schizophrenic psychosis, mood disorders, personality disorders, acute stress reaction) and each diagnostic group into three subgroups according to length of stay (T1< 7 days, T2 = 7–14 days, T3> 14 days). The subjective well-being indicators (subscales SWN: emotional regulation; self-control; mental functioning; social integration and physical functioning) and the severity of illness (CGI-S) were evaluated at admission and discharge.
Results
At discharge there is a statistically significant difference in the SWN subgroups among the four diagnostic groups except for social integration and total score with equal CGI-S scores. Schizophrenic patients and personality disorders show a subjective improvement at T2; mood disorders at T3; acute stress reactions T1 = T2. CGI shows a statistically improvement regardless of the length of stay.
Conclusions
Preliminary data suggest that SWN represents a predictor of clinical outcome and remission and together with the clinical evaluation it can help clinician to settle therapeutic programs.
Our Psychiatry Ward (SC Psichiatria, Maggiore della Carità Hospital, Novara) has a longstanding tradition in the training of clinicians (psychiatrists, but also non-psychiatrists) about the importance of the approach in helping relationships. This tradition reflects itself in the organization of the assistance to the acute psychiatric inpatients admitted to the Ward. In addition to treatment as usual, patients have the opportunity of being involved in several group activities. The activities are proposed to them, with an approach that varies according to the patient's lifetime diagnosis, current conditions, relational difficulties, etc. In other words, different activities may be proposed to different patients, in different ways.
Aims
To describe the integrated treatment approach we use in our Psychiatry Ward.
Methods
Group activities are guided by a group leader who is supported by one or two assistants whose role is to facilitate discussion. Activities include: Newspaper Reading (everyday in the morning, 1 hour); Music Listening Group (once a week; 1 hour); Cinema Group (once a week; 2 hours and a half); Fairytale Group (on alternating days in the evening, 1 hour).
Results
More details will be supplied regarding the theoretical background for the group, the group features/implementation, and its specific objectives.
Conclusions
All the group activities integrate themselves in an early rehabilitation project tailored to each patients' characteristics and needs. Briefly, their main objectives include: 1) to help patients endorse their cognitive, emotional and relational skills; 2) to offer support to the crisis they are experiencing, which led them to admission to the Ward.
Alexithymia is characterized by difficulties identifying and communicating feelings, and problems differentiating between feelings and bodily sensations; its concrete cognitive style focused on the external environment is typical of psychosomatic patients. Patients with eating disorders (EDs) have high levels of alexithymia, particularly difficulties identifying and describing their feelings.
Objective
The aims of our study are (1) to assess the alexythimia, emotional empathy, facial emotion identification skills and social inference abilities in a sample of ED patients; (2) to compare these variables between ED patients and healthy controls (HC); and (3) to correlate levels of alexithymia with the severity of the ED as measured by the Eating Disorder Inventory-3 (EDI-3) EDRC score in the ED group.
Methods
ED (N=42) and HC (N=42) were tested with the Toronto Alexithymia Scale (TAS-20), Eating Disorder Inventory (EDI-3), Facial Emotion Identification Test (FEIT), The Awareness of Social Inference Test (TASIT) and Interpersonal Reactivity Index (IRI).
Results
Data collection is being completed and the results’ analysis is ongoing. We expect the ED sample to show greater alexythimia and a poorer performance at FEIT and TASIT than HCs. We expect to find a linear correlation between the TAS-20 and EDRC score.
Conclusion
A better understanding of the role of alexithymia in ED etiology and maintenance might allow the development of targeted treatment approaches to help patients improve their skills in identifying and expressing emotions.
The original cognitive-behavioural model of bulimia nervosa (CBT-BN) proposes that specific dysfunctional cognitions and behavioural factors maintain BN, and has provided the basis for the widely used cognitive-behavioural therapy (CBT) of BN. However, Fairburn et al. (2003) noted that among treatment completers with BN, only 40% achieved full remission of the bulimic symptomatology. The enhanced CBT-BN model (CBT-E) proposed by the authors describes how four additional factors (i.e., clinical perfectionism, low self esteem, mood intolerance and interpersonal difficulties) interact with the core psychopathology of BN (i.e., over-evaluation of eating, weight, and shape and their control) to maintain the disorder.
Aims
The goal of this study was to examine (a) the validity of the CBT-E model and (b) whether each of the four hypothesized maintenance factors intensifies the core psychopathology-bulimic symptomatology relationship in a clinical sample.
Methods
Data were analysed from 362 adults seeking treatment for BN (n = 167) or atypical BN (n =195) at four Italian specialized care centres, using latent variable structural equation modeling approach.
Results
Both the measurement and the structural model were good fits for the data. All four hypothesized factors exacerbated the core psychopathology-bulimic symptomatology relationship. Core psychopathology explained approximately 47.7% of the variance of bulimic symptomatology. The inclusion of the direct effects and interaction terms increased the explained variance of bulimic symptomatology to 64%.
Conclusions
Overall, results supported the validity of the CBT-E model and highlighted the importance of assessment and treatment of the four maintenance processes included in the CBT-E model.
Patients affected by schizophrenia have deficits in social cognition, functioning and in properly interpreting facial expression. These disabilities contribute to global impairment in social and relational skills. Data started being collected in the context of the Italian-Network-of-Research-on-Psychosis, headed by Mario Maj and Silvana Galderisi, in our centre;collection went on also after the conclusion of the national project.
Aims
To compare social inference and facial emotion identification in schizophrenic patients and healthy controls.
Material and Methods
We recruited 50 patients with Schizophrenia and 50 healthy controls (HCs) matched for sex, age and level of education. Socio-demographic characteristics were gathered;assessment of both patients and HCs included The Awareness of Social Inference Test (TASIT) and the Facial Emotion Identification Test (FEIT);furthermore patients were assessed with the Positive and Negative Syndrome Scale (PANSS) and the Brief Negative Symptom Scale (BNSS).
Results
Some differences in socio-demographic variables emerged (patients are more often unemployed and single). Moreover, the preliminary analyses highlight several differences between schizophrenic patients and HCs at TASIT and FEIT:patients performed significantly worse than HCs in both tests, with longer reaction times.
Discussion
As expected schizophrenic patients showed social skills deficits and difficulties in identifying facial emotions. Our preliminary results point out disabilities in understanding social messages and interpreting human behaviour;these features underlie poor and limited social relationships proper to schizophrenia.
1 Galderisi S et al. The influence of illness-related variables, personal resources and context-related factors on real-life functioning of people with schizophrenia;WorldPsychiatry2014,13(3):275-287
2 Mucci A et al. The Specific Level of Functioning Scale: Construct validity, internal consistency and factor structure in a large Italian sample of people with schizophrenia living in the community Schizophr Res.2014Oct;159(1):144-50
Dual diagnosis (DD) is the coexistence of a Psychiatric Disorder (PD), and Substance Use Disorder (SUD). The increase of DD observed in recent years has caused serious problems to both public and private services organization.
Aims
Our aim is to assess the prevalence and features (including clinical and sociodemographic ones) of DD over a decade, comparing the period 2003–2004 and 2013–2014.
Methods
We performed a retrospective study retrieving the medical records of DD patients at their first admission to the Psychiatry Ward AOU “Maggiore della Carità”, Novara, Italy. Sociodemographic and clinical features were recorded. The two groups of patients (2003–2004 vs. 2013–2014) were compared.
Results
In both periods DD patients are usually Italian male, aged 19–40, single. They have usually attended middle school, live with parents, have two or more brothers and/or sisters but no kids. DD patients in 2003–2004 and 2013–2014 showed differences as far as employment and diagnosis are concerned. The first were more frequently employed than the latter: moreover the 2003–2004 patients were more frequently diagnosed with a personality disorder while the 2013–2014 patients had mixed diagnoses. We have found differences in the possible predictors of substance abuse in the two periods, as well.
Conclusions
The identification of changes in the prevalence of first admission DD patients and their clinical and sociodemographic features may help to highlight an evolving pattern of substance use and to identify possible risk factors which may be the target of prevention and treatment approaches.
Disclosure of interest
The authors have not supplied their declaration of competing interest.
Alunite-kaolinite deposits occur in argillized zones in acid volcanic rocks at Tolfa. Over seventy samples were examined by one or more of the following methods: thin section, DTA, X-ray, IR, TG, SEM, chemical, and hydrogen and oxygen isotope analysis. Kaolinite and dickite, of high structural order, are the dominant clays with micamontmorillonite and halloysite subordinate. In many samples kaolinite and dickite coexist; their relative amounts are variable but the dickite content tends to increase with depth. SEM studies show that dickite crystals—up to 30 µm—are bigger than kaolinite.
The D/H and 18O/16O ratios of six clays, a whole rock, two biotites from fresh host rock, two chalcedony veins and three local meteoric waters indicate that the clays formed in a meteoric-hydrothermal environment of acid hot spring type at about 80°C. The fresh volcanic host rocks are strongly enriched in 18O relative to ‘normal’ igneous rocks due to derivation from or exchange with 18O-rich sedimentary rocks at depth prior to hydrothermal and solfataric activity. In the absence of present-day geothermal activity the life of this hot spring system was less than 4 m.y.
Laser-induced fluorescence emission (LIFE) images were obtained in situ from a 27 cm long ice core at Lake Fryxell, Antarctica. The excitation was accomplished with a simple 532 nm green laser pen light, and the fluorescence images were captured with a small compact digital camera. The targets for the experiment were mm-scale cryoconite assemblages found in the ice covers of this perennially frozen Antarctic lake. The fluorescence response originates from photo-pigments in cyanobacteria-dominated cryoconite assemblages with phycoerythrin (PE) exhibiting the optimal target cross section. This inexpensive, low-mass, low-energy method avoids manipulation of the in situ habitat and individual target organisms and does not disturb the microbial community or the surrounding ice matrix. We establish the correlation between fluorescence intensity and PE concentration. We show that cryoconite fluorescence response does not appear to decrease with depth in the ice cover, in agreement with similar findings at Lake Untersee, a perennially ice-covered lake in Dronning Maud Land, Antarctica. Optical reflection and refraction events at the air/ice interface can complicate quantitative estimates of total pigment concentrations. Laser targeting of a single mm-scale cryoconite can result in multiple neighboring excitation events secondary to reflection and refraction phenomena in the multiple air/ice interface of the bubbles surrounding the primary target.