Book contents
- Frontmatter
- Contents
- Preface
- 1 Overview
- 2 Governing equations for mesoscale motions
- 3 Basic wave dynamics
- 4 Mesoscale wave generation and maintenance
- 5 Orographically forced flows
- 6 Thermally forced flows
- 7 Mesoscale instabilities
- 8 Isolated convective storms
- 9 Mesoscale convective systems
- 10 Dynamics of fronts and jet streaks
- 11 Dynamics of orographic precipitation
- 12 Basic numerical methods
- 13 Numerical modeling of geophysical fluid systems
- 14 Parameterizations of physical processes
- Appendices
- Index
- References
11 - Dynamics of orographic precipitation
Published online by Cambridge University Press: 15 December 2009
Book contents
- Frontmatter
- Contents
- Preface
- 1 Overview
- 2 Governing equations for mesoscale motions
- 3 Basic wave dynamics
- 4 Mesoscale wave generation and maintenance
- 5 Orographically forced flows
- 6 Thermally forced flows
- 7 Mesoscale instabilities
- 8 Isolated convective storms
- 9 Mesoscale convective systems
- 10 Dynamics of fronts and jet streaks
- 11 Dynamics of orographic precipitation
- 12 Basic numerical methods
- 13 Numerical modeling of geophysical fluid systems
- 14 Parameterizations of physical processes
- Appendices
- Index
- References
Summary
Orographic influence on climatological distribution of precipitation
Orographic influence on the formation of clouds and its associated precipitation amount and distribution is dramatic. The influence of orography was well recognized very early in human history and documented in numerous meteorological and climatological literatures. When a moist airflow impinges on a mountain, the dynamical and cloud microphysical characteristics of the airflow are modified by orographic lifting and blocking which may modify and/or trigger cloud and precipitation systems in the vicinity of the mountain. Figure 11.1 shows the mean annual precipitation for the period 1971–1990 over Western Europe. Areas of heavy precipitation are concentrated on the Alpine mountains. Note that precipitation over the Alps is produced by weather systems coming from different directions, in particular, from the northern and southern sides.
Over a meso-α/β or large-scale mountain range, precipitation is triggered or enhanced on the windward slope of a prevailing wind due to orographic lifting on the upwind slope. A larger advection time is required for an air parcel to pass over the windward slope compared to the formation time of orographic clouds and precipitation. On the lee side of the mountain, there is little or no rain due to the depletion of moisture over the upwind slope and the adiabatic warming associated with the descending air, known as rain shadow. In short, the overall influence of mountains on climatological precipitation is orographic precipitation enhancement and suppression in the windward and lee sides of mountains, respectively.
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- Mesoscale Dynamics , pp. 442 - 488Publisher: Cambridge University PressPrint publication year: 2007
References
, 1986. Mesoscale indexing of the distribution of orographic precipitation over high mountains. J. Atmos. Sci., 25, 532–45.Google Scholar
, , , and , 2003. Analysis and simulation of local regional conditions for the rainfall over the Lago Maggiore Target Area during MAP IOP 2b. Quart. J. Roy. Meteor. Soc., 129, 565–86.CrossRefGoogle Scholar
Banta, R. M., 1990. The role of mountain flows in making clouds. Atmospheric Processes over Complex Terrain, (ed.), Meteor. Monogr., 45, Amer. Meteor. Soc., 229–283.Google Scholar
and , 1985. A nonlinear steady model for moist hydrostatic mountain waves. J. Atmos. Sci., 42, 58–67.2.0.CO;2>CrossRefGoogle Scholar
, , and , 1979. On the two-dimensional, hydrostatic flow of a stream of moist air over a mountain ridge. Geophys. Astrophys. Fluid Dyn., 12, 1–16.Google Scholar
and , 1998. Orographic effects during a severe wintertime rainstorm in the Appalachian Mountains. Mon. Wea. Rev., 126, 2648–72.2.0.CO;2>CrossRefGoogle Scholar
, 1949. The problem of artificial control of rainfall on the globe. II. The coastal orographic maxima of precipitation in autumn and winter. Tellus, 1, 15–32.CrossRefGoogle Scholar
, , , , , , , , and , 2001. The MAP special observing period. Bull. Amer. Meteor. Soc., 82, 433–62.2.3.CO;2>CrossRefGoogle Scholar
and , 2003. Observations and impacts of upstream blocking during a widespread orographic precipitation event. Quart. J. Roy. Meteor. Soc., 129, 391–409.CrossRefGoogle Scholar
, , and , 1974. Structure and mechanism of precipitation and the effect of orography in a wintertime warm sector. Quart. J. Roy. Meteor. Soc., 100, 309–30.CrossRefGoogle Scholar
and , 1992. Analysis and numerical modeling of a frontal passage associated with thunderstorm development over the Po Valley and the Adriatic Sea. Meteor. Atmos. Phys., 48, 205–24.CrossRefGoogle Scholar
and , 2000. Mesoscale meteorological features associated with heavy precipitation in the Southern Alpine region. Meteor. Atmos. Phys., 72, 131–46.CrossRefGoogle Scholar
, , and , 1998. Numerical simulations of the 1994 Piemont flood: Role of orography and moist processes. Mon. Wea. Rev., 126, 2369–83.2.0.CO;2>CrossRefGoogle Scholar
and , 1983. A model of the feeder-seeder mechanism of orographic rain including stratification and wind-drift effects. Quart. J. Roy. Meteor. Soc., 109, 575–88.Google Scholar
, , and , 1991. A study of a mountain-generated precipitation system in northern Taiwan during TAMEX IOP 8. Mon. Wea. Rev., 119, 2574–606.2.0.CO;2>CrossRefGoogle Scholar
and , 2005a. Effects of moist Froude number and CAPE on a conditionally unstable flow over a mesoscale mountain ridge. J. Atmos. Sci., 62, 331–50.CrossRefGoogle Scholar
and , 2005b. Orographic effects on a conditionally unstable flow over an idealized three-dimensional mesoscale mountain. Meteor. Atmos. Phys., 88, 1–21.CrossRefGoogle Scholar
, , and , 2004. Numerical study of the orographic forcing of heavy precipitation during MAP IOP-2B. Mon. Wea. Rev., 132, 2184–203.2.0.CO;2>CrossRefGoogle Scholar
and , 2000. Effects of orography on the generation and propagation of mesoscale convective systems in a two-dimensional conditionally unstable flow. J. Atmos. Sci., 57, 3817–37.2.0.CO;2>CrossRefGoogle Scholar
, 2004. Sensitivity of orographic precipitation to changing ambient conditions and terrain geometries: An idealized modeling perspective. J. Atmos. Sci., 61, 588–606.2.0.CO;2>CrossRefGoogle Scholar
and , 2007. The impact of coastal boundaries and small hills on the precipitation distribution across southern Connecticut. Mon. Wea. Rev., 135, 933–54.CrossRefGoogle Scholar
and , 2004. Bulk microphysical sensitivities within the MM5 for orographic precipitation. Part I: The Sierra 1986 event. Mon. Wea. Rev., 132, 2780–801.CrossRefGoogle Scholar
and , 1980. Winter storms over the San Juan Mountains. Part III: Seeding potential. J. Appl. Meteor., 19, 942–9.2.0.CO;2>CrossRefGoogle Scholar
and , 1986. Diabatic modification of airflow over a mesoscale orographic ridge: A model study of the coupled response. Quart. J. Roy. Meteor. Soc., 112, 711–30.CrossRefGoogle Scholar
, , and , 1996. Flash flood forecasting: An ingredient-based methodology. Wea. Forecasting, 11, 560–81.2.0.CO;2>CrossRefGoogle Scholar
, , and , 1998. A diagnostic study of three heavy precipitation episodes in the western Mediterranean region. Wea. Forecasting, 13, 102–24.2.0.CO;2>CrossRefGoogle Scholar
and , 1982. The effects of moisture on trapped mountain lee waves. J. Atmos. Sci., 39, 2490–506.2.0.CO;2>CrossRefGoogle Scholar
, 1988. Estimates of thunderstorm precipitation efficiency from field measurements in CCOPE. Mon. Wea. Rev., 116, 663–84.2.0.CO;2>CrossRefGoogle Scholar
, , and , 2000: Numerical simulations of the 1994 Piedmont flood of 4–6 November. Tellus, 52A, 162–80.CrossRefGoogle Scholar
, , and , 1973: A theoretical study of air and fallout of solid precipitation over mountainous terrain: Part I. J. Atmos. Sci., 30, 801–12.2.0.CO;2>CrossRefGoogle Scholar
and , 1998. A precipitation climatology of the Alps from high-resolution rain-gauge observations. Int'l J. Clim., 18, 873–900.3.0.CO;2-9>CrossRefGoogle Scholar
and , 2003. Small-scale rainfall mechanisms for an idealized convective southerly flow. Quart. J. Roy. Meteor. Soc., 129, 1819–40.CrossRefGoogle Scholar
and , 1984. Interaction of low-level flow with the Western Ghats Mountains and offshore convection in the summer monsoon. Mon. Wea. Rev., 112, 652–72.2.0.CO;2>CrossRefGoogle Scholar
, , and , 1973. A theoretical study of the flow of air and fallout of solid precipitation over mountainous terrain: Part II. J. Atmos. Sci., 30, 813–23.2.0.CO;2>CrossRefGoogle Scholar
, , and , 1975. The dynamical and microphysical structure of an occluded frontal system and its modification by orography. J. Atmos. Sci., 32, 1542–62.2.0.CO;2>CrossRefGoogle Scholar
and , 2005. Turbulence as a mechanism for orographic precipitation enhancement. J. Atmos. Sci., 62, 3599–623.CrossRefGoogle Scholar
and , 2003. Cloud timescales and orographic precipitation. J. Atmos. Sci., 60, 1543–59.CrossRefGoogle Scholar
, 1994. Mountain-originated mesoscale precipitation system in northern Taiwan: A case study 21 June 1991. Terr. Atmos. Ocean, 5, 169–97.CrossRefGoogle Scholar
and , 2004. Factors governing cellular convection in orographic precipitation. J. Atmos. Sci., 61, 682–98.2.0.CO;2>CrossRefGoogle Scholar
and , 1973. A radar climatology of summertime convective clouds in the Black Hills. J. Appl. Meteor., 12, 359–68.2.0.CO;2>CrossRefGoogle Scholar
, 2005. Dynamics of orographic precipitation. 2005 Yearbook of Science & Technology, McGraw Hill, 248–250.Google Scholar
, , , , and , 2001. Some common ingredients for heavy orographic rainfall. Wea. Forecasting, 16, 633–60.2.0.CO;2>CrossRefGoogle Scholar
, , , and , 2005. Formation mechanisms for convection over the Ligurian Sea during MAP IOP-8. Mon. Wea. Rev., 133, 2227–45.CrossRefGoogle Scholar
, , and , 1998. Heavy precipitation on the Alpine southside: An upper-level precursor. Geophys. Res. Lett., 25, 1435–38.CrossRefGoogle Scholar
and , 2003. Air motions and precipitation growth in Alpine storms. Quart. J. Roy. Meteor. Soc., 129, 345–72.CrossRefGoogle Scholar
and , 2001. A numerical study of moist stratified flows over isolated topography. Tellus, 53A, 481–99.CrossRefGoogle Scholar
and , 2005. Numerical simulations of moist nearly neutral flow. J. Atmos. Sci., 62, 1410–27.CrossRefGoogle Scholar
and , 1988. Numerical study of orographic-convective precipitation over the Eastern Arabian Sea and the Ghats Mountains during the summer monsoon. J. Atmos. Sci., 45, 2097–122.2.0.CO;2>CrossRefGoogle Scholar
and , 1970. A numerical simulation of the life history of a rainstorm. J. Atmos. Sci., 27, 1148–59.2.0.CO;2>CrossRefGoogle Scholar
, , and , 1999. The Madison County, Virginia, flash flood of 27 June 1995. Wea. Forecasting, 14, 384–404.2.0.CO;2>CrossRefGoogle Scholar
, , , and , 2005. Radar evidence of orographic enhancement due to the seeder feeder mechanism. Meteor. Appl., 12, 199–206.CrossRefGoogle Scholar
, , and , 2005. Dropsonde observations in low-level jets over the northeastern Pacific Ocean from CALJET-1998 and PACJET-2001: Mean vertical-profile and atmospheric-river characteristics. Mon. Wea. Rev., 133, 889–910.CrossRefGoogle Scholar
, 1992. Microphysical structure and evolution of a Central Sierra Nevada orographic cloud system. J. Appl. Meteor., 31, 3–24.2.0.CO;2>CrossRefGoogle Scholar
and , 2006. Effect of stable layer formation over the Po Valley on the development of convection during MAP IOP-8. J. Atmos. Sci., 63, 2567–84.CrossRefGoogle Scholar
, , , , and , 2003. High-resolution numerical simulations of the convective system observed in the Lago Maggiore area on 17 September 1999 (MAP IOP 2a). Quart. J. Roy. Meteor. Soc., 129, 543–63.CrossRefGoogle Scholar
and , 2001. Mechanisms of intense Alpine rainfall. J. Atmos. Sci., 58, 1732–49.2.0.CO;2>CrossRefGoogle Scholar
and , 2003. Orographic effects on rainfall in MAP cases IOP2B and IOP8. Quart. J. Roy. Meteor. Soc., 129, 373–90.CrossRefGoogle Scholar
and , 2007. Lessons on orographic precipitation from MAP. Quart. J. Roy. Meteor. Soc., 133, 811–30.CrossRefGoogle Scholar
, 1979. Cumulus development on the windward side of a mountain range in convectively unstable air mass. J. Meteor. Soc. Japan, 57, 341–8.CrossRefGoogle Scholar
, 1966. A dynamical model of orographic rainfall. Mon. Wea. Rev., 94, 555–72.2.3.CO;2>CrossRefGoogle Scholar
, 1956. The physical and dynamical problems of orographic rain. Weather, 11, 375–81.CrossRefGoogle Scholar
, and , 2000. Idealised numerical experiments of Alpine flow regimes and southside precipitation events. Meteor. Atmos. Phys., 72, 233–50.CrossRefGoogle Scholar
, 1990. South foehn studies since the ALPEX experiment. Meteor. Atmos. Phys., 43, 91–103.CrossRefGoogle Scholar
, 1993. A diagnostic study of the extratropical precipitation resulting from Tropical Cyclone Bola. Mon. Wea. Rev., 121, 2690–707.2.0.CO;2>CrossRefGoogle Scholar
, 1994. A diagnostic model for estimating orographic precipitation. J. Appl. Meteor., 33, 1163–75.2.0.CO;2>CrossRefGoogle Scholar
Smith, B., II, Y.-L. Lin, and H. D. Reeves, 2006. Effects of cyclone track on precipitation distribution along the California Coastal Range and Sierra Nevada. 12th Conf. Mount. Meteor., Amer. Meteor. Soc., Aug. 28–Sept. 1, Santa Fe, New Mexico.
, 1979. The influence of mountains on the atmosphere. Adv. in Geophys., 21, 87–230.CrossRefGoogle Scholar
, 1982. A differential advection model of orographic rain. Mon. Wea. Rev., 110, 306–9.2.0.CO;2>CrossRefGoogle Scholar
Smith, R. B., 2006. Progress on the theory of orographic precipitation. In Tectonics, Climate and Landscape Evolution: Geol. Soc. Amer. Special Paper 398, S. D. Willett et al. (eds.), Penrose Conf. Series, 1–16, doi: 10.1130/2006.2398(01).CrossRef
and , 2004. A linear theory of orographic precipitation. J. Atmos. Sci., 61, 1377–91.2.0.CO;2>CrossRefGoogle Scholar
and , 1982. The addition of heat to a stratified airstream with application to the dynamics of orographic rain. Quart. J. Roy. Meteor. Soc., 108, 353–78.CrossRefGoogle Scholar
, , , , , , and , 2003. Orographic precipitation and air mass transformation: An Alpine example. Quart. J. Roy. Meteor. Soc., 129, 433–54.CrossRefGoogle Scholar
, , and , 1988. On the dynamics of Hawaiian Cloud Bands: Island Forcing. J. Atmos. Sci., 45, 1872–905.2.0.CO;2>CrossRefGoogle Scholar
, 2004. Exploration of some convective regimes over the Alpine orography. Quart. J. Roy. Meteor. Soc., 130, 481–502.CrossRefGoogle Scholar
Steinacker, R. 2006. Alpiner Föhn – eine neue Strophe zu einem alten Liedin: Atmosphäre und Gebirge – Anregung von ausgeprägten Empfindlichkeiten Promet, 32, 3–10, Deutscher Wetterdienst.
, , , , and , 2003. Airflow within major Alpine river valleys under heavy rainfall. Quart. J. Roy. Meteor. Soc., 129, 411–32.CrossRefGoogle Scholar
, , , and , 2004. Observations of the temporal evolution and spatial structure of the gap flow in the Wipp Valley on 2 and 3 October 1999. Mon. Wea. Rev., 132, 2684–97.CrossRefGoogle Scholar
, , , and , 2003. Coastal orographic rainfall processes observed by radar during the California land-falling jets experiment. J. Hydrometeor., 4, 264–82.2.0.CO;2>CrossRefGoogle Scholar
, , and , 2005. Dynamics of orographic rain associated with the passage of a tropical cyclone over a mesoscale mountain. Terr. Atmos. Ocean, 16, 1133–61.CrossRefGoogle Scholar
, , , , , , , , and , 2001. The Advanced Regional Prediction System (ARPS) – a multi-scale nonhydrostatic atmospheric simulation and prediction tool. Part II: Model physics and applications. Meteor. Atmos. Phys., 76, 143–65.CrossRefGoogle Scholar
and , 1998. Characteristics of rainfall distributions over Taiwan during the Taiwan Area Mesoscale Experiment (TAMEX). Mon. Wea. Rev., 37, 1457–69.Google Scholar
, and , 2003. Microphysical modes of precipitation growth determining by S-band vertically pointing radar in orographic precipitation during MAP. Quart. J. Roy. Meteor. Soc., 129, 455–76.CrossRefGoogle Scholar
, , and , 2004. Numerical simulations of the foehn in the Rhine Valley on 24 October 1999. Mon. Wea. Rev., 132, 368–89.2.0.CO;2>CrossRefGoogle Scholar
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