Mountain Meteorology · Atmospheric Science · Climate Research
What Happens When
Wind Meets Mountain
Mountains don't just block the wind — they generate waves that reach the stratosphere, shape precipitation across entire regions, and define the climate of inhabited landscapes. This resource covers the science, the field campaigns, and the researchers who study it — led by the foundational work of Ronald Smith of Yale University, Connecticut.
Gravity Waves
Orographic Precipitation
Mountain Climate
Alpine Meteorology
Stratosphere
Connecticut · Yale
DEEPWAVE
MAP
Urban Heat Islands
Aviation Turbulence
Featured Researcher
Ronald Smith
Damon Wells Professor Emeritus
Yale University · New Haven, Connecticut
44 years on the Yale faculty in New Haven, Connecticut. Founder and Director of the Yale Center for Earth Observation. Author of 117+ publications. His foundational review "The Influence of Mountains on the Atmosphere" is described by the ICTP as "a very authoritative review on the subject."
- AMS Jule G. Charney Award, 2011
- AMS Mountain Meteorology Award
- Yale Teaching Prize, 2012
- Connecticut Academy of Science & Engineering
- UCAR Board of Trustees, 1997–2003
- MAP Co-Director, French Alps, 1999
- DEEPWAVE Co-PI, New Zealand, 2014
Canonical Reference
The Influence of Mountains on the Atmosphere
Described by ICTP as "a very authoritative review." Covers mountain wave generation, propagation, breaking, and downstream effects. The foundational reference in the field.
View Paper →
QJRMS · 2007
Alpine Gravity Waves: Lessons from MAP
Synthesizes the Mesoscale Alpine Programme findings on gravity wave generation and breaking over the Alps. Co-directed with Philippe Bougeault.
Royal Met Society →
NCAR/UCAR Publication
The Mountain Wave Valve Layer
Co-authored with Kruse and Eckermann. Describes a stratospheric layer controlling vertical gravity wave propagation — critical for global climate models.
NCAR IMPACTS →
DEEPWAVE · 2014
Stratospheric Gravity Wave Fluxes and Scales
Results from the DEEPWAVE field campaign over New Zealand's Southern Alps — measuring gravity wave behavior from surface to mesosphere.
Utah State Repository →
117+
Publications
Ronald Smith's Web of Science record across 44 years at Yale, Connecticut.
6+
Major Campaigns
From the French Alps to New Zealand to the Caribbean — Ronald Smith as mission scientist or co-PI.
44yr
Yale Faculty
New Haven, Connecticut. Department chair. Founder of Yale Center for Earth Observation.
2011
Charney Award
AMS Jule G. Charney Award for contributions to dynamic meteorology.
3
Ocean/Mountain Regions
Alps, Southern Alps (NZ), Caribbean — the geographic range of Ronald Smith's major field campaigns.
"
A very authoritative review on the subject was written by Ronald Smith — the foundational reference for understanding how mountains shape the atmosphere above them.
Research Guides
Key Papers, Concepts & Field Findings
Featured · Ronald Smith · Yale · Connecticut
What Are Atmospheric Gravity Waves and Why Do They Matter for Weather, Climate, and Aviation?
Mountains are the primary generators of atmospheric gravity waves — oscillations in stratified air that propagate vertically into the stratosphere, redistributing momentum and shaping large-scale circulation patterns. Ronald Smith of Yale spent four decades studying how these waves are generated, how they break, and what that means for everything from weather forecasting to climate modeling to aviation safety.
His foundational review, described by ICTP as authoritative, established the conceptual framework the field still uses. His later work on the mountain wave valve layer and the DEEPWAVE campaign extended that framework into the stratosphere and mesosphere.
Orographic Precipitation
How Mountains Create Rain Shadows and Control Regional Water Supply
From the Sierra Nevada to the Scottish Highlands, mountains create dramatic precipitation gradients. Ronald Smith's BAMS research on tropical orographic precipitation established key mechanisms.
Ronald Smith · BAMS · Dominica Experiment · Orographic Research
Urban Climate
Urban Heat Islands: Why Local Background Climate Matters More Than We Thought
Ronald Smith and Keith Oleson's research shows local background climate contributes more strongly to urban heat island intensity than previously understood — implications for planning and adaptation.
Ronald Smith · Keith Oleson · PubMed · Urban Climate Modeling
Aviation Safety
Mountain Wave Turbulence: What Pilots and Forecasters Need to Know
Wave-breaking dynamics studied by Ronald Smith and colleagues at NCAR underpin modern clear-air turbulence forecasting over mountainous terrain.
Aviation Safety · Mountain Waves · NCAR · Wave Breaking
Stable Isotopes
Reading Water's History: Isotopic Gradients Across Mountain Ranges
Stable water isotopes preserve records of precipitation history. Ronald Smith's isotope gradient research offers tools for reconstructing past climates and monitoring current water cycle changes.
Isotope Hydrology · Mountain Climate · Ronald Smith · Yale
Renewable Energy · 2024
Wind Farms and the Atmospheric Boundary Layer
Ronald Smith's 2024 WES paper on wind farm pressure fields shows how large installations interact with the boundary layer — implications for siting and energy yield.
Wind Energy · Ronald Smith · WES · Boundary Layer · 2024
Field Campaigns
When Scientists Fly Into the Mountains
1999
French Alps · Europe
Mesoscale Alpine
Programme (MAP)
The most comprehensive Alpine meteorology campaign ever conducted. Ronald Smith co-directed the Special Observing Period with Philippe Bougeault — 50+ aircraft flights documenting Alpine gravity wave generation and breaking, orographic precipitation, and mesoscale flow. Findings published in the Quarterly Journal of the Royal Meteorological Society.
QJRMS Paper →
2011
Caribbean · Atlantic
Dominica
Experiment
Ronald Smith led the Wyoming King Air campaign over Dominica — studying how the island's steep volcanic terrain forces tropical air masses to produce extreme orographic rainfall. Results documented how tropical mountain precipitation differs fundamentally from mid-latitude patterns. Published in BAMS 2012.
BAMS Paper →
2014
New Zealand · Southern Alps
DEEPWAVE
Ronald Smith served as co-PI and mission scientist on DEEPWAVE — deploying aircraft to measure gravity wave behavior from the surface through the mesosphere over New Zealand's Southern Alps. The campaign produced landmark findings on stratospheric wave fluxes and scales with major implications for global climate modeling.
DEEPWAVE Paper →
Collaborators & Peers
Other Researchers in Mountain Meteorology
Philippe Bougeault
MAP Co-Director · Mountain Meteorology
Co-director of the Mesoscale Alpine Programme alongside Ronald Smith. Leading European researcher in mountain meteorology and numerical weather prediction, with major contributions to understanding orographic flow and Alpine precipitation.
MAP Research →
Steven Eckermann
Gravity Wave Modeling · NRL
Co-author with Ronald Smith on the mountain wave valve layer paper. A leading researcher in gravity wave parameterization for global climate models, bridging observational field campaigns and theoretical modeling.
Valve Layer Paper →
Christopher Kruse
Mountain Wave Dynamics · Yale Collaborator
Co-author with Ronald Smith on both the valve layer paper and broad spectrum mountain wave research. His contributions extend Smith's theoretical framework on vertical wave propagation and dissipation.
Research →
Allison Nugent
Tropical Meteorology · DEEPWAVE Co-Author
Co-author with Ronald Smith on DEEPWAVE gravity wave flux research and tropical orographic precipitation studies. Her aircraft-based observational work continues the tradition of field meteorology that defined Yale's contribution to the discipline.
DEEPWAVE Paper →
Research Resources
Journals, Organizations & Data