Regional climate model projections of rainfall from U.S. landfalling tropical cyclones

Verfasser / Beitragende:
[Daniel Wright, Thomas Knutson, James Smith]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 45/11-12(2015-12-01), 3365-3379
Format:
Artikel (online)
ID: 605472653
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024 7 0 |a 10.1007/s00382-015-2544-y  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-015-2544-y 
245 0 0 |a Regional climate model projections of rainfall from U.S. landfalling tropical cyclones  |h [Elektronische Daten]  |c [Daniel Wright, Thomas Knutson, James Smith] 
520 3 |a The eastern United States is vulnerable to flooding from tropical cyclone rainfall. Understanding how both the frequency and intensity of this rainfall will change in the future climate is a major challenge. One promising approach is the dynamical downscaling of relatively coarse general circulation model results using higher-resolution regional climate models (RCMs). In this paper, we examine the frequency of landfalling tropical cyclones and associated rainfall properties over the eastern United States using Zetac, an 18-km resolution RCM designed for modeling Atlantic tropical cyclone activity. Simulations of 1980-2006 tropical cyclone frequency and rainfall intensity for the months of August-October are compared against results from previous studies and observation-based datasets. The 1980-2006 control simulations are then compared against results from three future climate scenarios: CMIP3/A1B (late twenty-first century) and CMIP5/RCP4.5 (early and late twenty-first century). In CMIP5 early and late twenty-first century projections, the frequency of occurrence of post-landfall tropical cyclones shows little net change over much of the eastern U.S. despite a decrease in frequency over the ocean. This reflects a greater landfalling fraction in CMIP5 projections, which is not seen in CMIP3-based projections. Average tropical cyclone rain rates over land within 500km of the storm center increase by 8-17% in the future climate projections relative to control. This is at least as much as expected from the Clausius-Clapeyron relation, which links a warmer atmosphere to greater atmospheric water vapor content. Over land, the percent enhancement of area-averaged rain rates from a given tropical cyclone in the warmer climate is greater for larger averaging radius (300-500km) than near the storm, particularly for the CMIP3 projections. Although this study does not focus on attribution, the findings are broadly consistent with historical tropical cyclone rainfall changes documented in a recent observational study. The results may have important implications for future flood risks from tropical cyclones. 
540 |a Springer-Verlag (outside the USA), 2015 
690 7 |a Tropical cyclones  |2 nationallicence 
690 7 |a Extreme rainfall  |2 nationallicence 
690 7 |a Floods  |2 nationallicence 
690 7 |a Climate impacts  |2 nationallicence 
690 7 |a Climate modeling  |2 nationallicence 
690 7 |a Dynamical downscaling  |2 nationallicence 
700 1 |a Wright  |D Daniel  |u NASA Hydrological Sciences, Goddard Space Flight Center, 8800 Greenbelt Rd, 20771, Greenbelt, MD, USA  |4 aut 
700 1 |a Knutson  |D Thomas  |u Geophysical Fluid Dynamics Laboratory/NOAA, 08542, Princeton, NJ, USA  |4 aut 
700 1 |a Smith  |D James  |u Department of Civil and Environmental Engineering, Princeton University, 08544, Princeton, NJ, USA  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3365-3379  |x 0930-7575  |q 45:11-12<3365  |1 2015  |2 45  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-015-2544-y  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-015-2544-y  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Wright  |D Daniel  |u NASA Hydrological Sciences, Goddard Space Flight Center, 8800 Greenbelt Rd, 20771, Greenbelt, MD, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Knutson  |D Thomas  |u Geophysical Fluid Dynamics Laboratory/NOAA, 08542, Princeton, NJ, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Smith  |D James  |u Department of Civil and Environmental Engineering, Princeton University, 08544, Princeton, NJ, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/11-12(2015-12-01), 3365-3379  |x 0930-7575  |q 45:11-12<3365  |1 2015  |2 45  |o 382