Imtiaz Rangwala

Imtiaz Rangwala

Western Water Assessment
NOAA Earth System Research Laboratory
R/PSD 325 Broadway
Boulder, Colorado 80305


Imtiaz Rangwala is a research scientist at the Cooperative Institute for Research in Environmental Sciences (CIRES) at the University of Colorado, Boulder and NOAA’s Physical Sciences Division. He is a climate scientist with training in assessing and diagnosing regional scale climate change. He employs the use of climate observations and models for understanding and quantifying climate processes relevant to regional trends in warming and changing hydrological processes. He is specifically interested in advancing the understanding related to changing water balance and climate extremes in the western US (including the Great Plains), as well as its relevance to ecosystem response. His interests also include understanding and working with future climate change uncertainty in the context of decision-making and climate adaptation. He has extensive experience in the development and communication of useful and usable future climate change scenarios for natural resource management. Dr. Rangwala also has expertise on climate change in high elevation regions with past research focused on regions such as the Colorado Rocky Mountains and the Tibetan Plateau. He is part of a global community of scientists focused on examining the issue of elevation dependent climate change in mountain regions.

Curriculum Vitae

Research Interests

Regional Climate Projections & Scenarios, Drought and Weather Extremes, High Elevation Climate Change (Colorado Rockies & Tibetan Plateau), Climate Change Impacts on Water Resources & Ecosystem Response, Regional Climate Models


Dewes C.F., I. Rangwala, J. J. Barsugli, M.T. Hobbins, and S. Kumar (2017). Drought risk assessment under climate change is sensitive to methodological choices for the estimation of evaporative demand. PLoS ONE 12(3): e0174045. doi:10.1371/journal.pone.0174045.

Rangwala, I., C. Dewes, and J. Barsugli (2016). High Resolution Climate Modeling for Regional Adaptation. EOS, Vol. 97, doi: 10.1029/2016EO048615, March 25.

Pepin, N., R. S. Bradley, H. F. Diaz, M. Baraer, E. B. Caceres, N. Forsythe, H. Fowler, G. Greenwood, M. Z. Hashmi, X. D. Liu, J. R. Miller, L. Ning, A. Ohmura, E. Palazzi, I. Rangwala, W. Schöner, I. Severskiy, M. Shahgedanova, M. B. Wang, S. N. Williamson, and D. Q. Yang (2015). Elevation-dependent warming in mountain regions of the world. Nature Climate Change, 5: 424-430, doi: 10.1038/nclimate2563.

Rangwala, I., Bardsley, T., Pescinski, M., and J. Miller (2015). SNOTEL sensor upgrade has caused temperature record inhomogeneities for the Intermountain West: Implications for climate change impact assessments. Western Water Assessment Climate Research Briefing.

Rangwala I., N. Pepin, M. Vuille and J. Miller, (2015). Influence of Climate Variability and Large-Scale Circulation on Mountain Cryosphere. In The High-Mountain Cryosphere: Environmental Changes and Human Risks, edited by C. Huggel, J Clague, A. Kääb and M. Carey. Chapter 2. Cambridge University Press.

Rangwala I., E. Sinsky, and J. Miller (2015). Variability in Projected Elevation Dependent Warming in Boreal Midlatitude Winter in CMIP5 Climate Models and its Potential Drivers. Climate Dynamics, doi:10.1007/s00382-015-2692-0.

Chen, Y., C. Naud, I. Rangwala, C. Landry and J. Miller (2014). Comparison of the sensitivity of surface downward longwave radiation to changes in water vapor at two high elevation sites. Environmental Research Letters. 9(11): 114015.

Naud C., I. Rangwala, M. Xu and J.A. Miller (2014). A satellite view of the radiative impact of clouds on surface downward fluxes in the Tibetan Plateau. Journal of Applied Meteorology and Climatology, doi:10.1175/JAMC-D-1114-0183.1171.

Naud, C., Y. Chen, I. Rangwala and J. A. Miller (2013). Sensitivity of downward longwave surface radiation to moisture and cloud changes in a high elevation region. Journal of Geophysical Research 118, 10,072–10,081, doi:10.1002/jgrd.50644.

Rangwala, I., E. Sinsky, and J. R. Miller (2013). Amplified warming projections for high altitude regions of the northern hemisphere mid-latitudes from CMIP5 models. Environmental Research Letters, Volume 8, doi:10.1088/1748-9326/8/2/024040.

Rangwala I. (2012). Amplified Water Vapor Feedback at High Altitudes during Winter. International Journal of Climatology. DOI: 10.1002/joc.3477.

Rangwala I. and J. Miller (2012). Climate Change in Mountains: A Review of Elevation Dependent Warming and its Possible Causes. Climatic Change. DOI: 10.1007/s10584-012-0419-3.

Rangwala I., J. Barsugli, K. Cozzetto, J. Neff and J. Prairie (2012). Mid-21st Century Projections in Temperature Extremes in the Southern Colorado Rocky Mountains from Regional Climate Models. Climate Dynamics. DOI: 10.1007/s00382-011-1282-z.

Rangwala I. and J. Miller (2010). 20th Century Temperature Trends Colorado’s San Juan Mountains. Arctic, Antarctic and Alpine Research, 42(1): 89-97.

Rangwala I., J. Miller, G. L. Russell and M. Xu (2010). Using A Global Climate Model to Evaluate the Influences of Water Vapor, Snow Cover and Atmospheric Aerosol on Warming in the Tibetan Plateau During the 21st Century. Climate Dynamics, 34: 859-872, DOI: 10.1007/s00382-009-0564-1.

Rangwala I., J. Miller and M. Xu (2009). Warming in the Tibetan Plateau: Possible Influences of the Changes in Surface Water Vapor. Geophysical Research Letters. 36, DOI: 10.1029/2009GL037245.

Rangwala I., J. Miller, G. L. Russell and M. Xu (2006). Analysis of Global Climate Model Experiments To Elucidate Past and Future Changes in Surface Insolation and Warming in China. Geophysical Research Letters, 33 (20), CiteID L20709. DOI 10.1029/2006GL027778.

Other Publications (Reports and Book Chapters)

Rangwala, I., M. Hobbins, J. Barsugli, and C. Dewes (2015). EDDI: A Powerful Tool For Early Drought Warning. WWA 2-pager document.

Lukas J., J. Barsugli, N. Doesken, I. Rangwala and K. Wolter (2014). Climate Change in Colorado: A Synthesis to Support Water Resources Management and Adaptation. A Report for the Colorado Water Conservation Board.

Miller, J., I. Rangwala and D. Ghatak (2012). Potential Climate and Hydrological Changes in the Aral Sea Region. In Disaster by Design: The Multiple Caused Catastrophes of the Aral Sea, M R. Edelstein, A. Cerny and A. Gadaev (eds.), ISBN: 978-1-78190-375-9, Chapter 5. Emerald Group Publishing Limited.

Cozzetto, K., I. Rangwala and J. Lukas (2011). Examining Regional Climate Model (RCM) projections: What do they add to our picture of future climate in the region? Featured article in the July issue of “Intermountain West Climate Summary” by NOAA’s Western Water Assessment.

Rangwala I. and J. Miller (2010). Long-Term Temperature Trends in the San Juan Mountains. In Eastern San Juan Mountains: Their Geology, Ecology and Human History, edited by Rob Blair and George Bracksieck, University Press of Colorado.