caa a22 4500 605474842 CHVBK 20210128100349.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00382-014-2442-8 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2442-8 Impacts of land-atmosphere coupling on regional rainfall and convection [Elektronische Daten] [Yue Zheng, Anil Kumar, Dev Niyogi] By analyzing rainfall events over four land-atmosphere coupling hotspot regions, the study assesses the need for adopting a dynamic coupling strength within the land surface model. The study aims to investigate the impacts of land-atmosphere coupling on mesoscale convection and rainfall over different hotspot regions. Impacts of land-atmosphere coupling are analyzed using Noah land model and Weather Research and Forecasting (WRF) model simulations over U.S. Southern Great Plains (SGP), Europe, northern India, and West Africa. The SGP stands out as a region of strong land-atmosphere coupling. While, over India and West Africa the default WRF model leads to too strong coupling effects. The results show improvements by adopting the dynamic coupling coefficient in simulating surface fluxes and resulting atmospheric state. For the four regions, the results indicate that the surface coupling coefficient does not affect the general location but could improve the intensity of the simulated precipitation. There is high uncertainty in land-atmosphere coupling and the results from this and prior studies need to be considered with caution. In particular, zones identified as coupling hotspots in climate studies and their coupling strength would likely change depending on the model formulations and coupling coefficient assigned. Results support the use of the dynamic coupling formulation for use in future studies but with a caution for use over complex terrains. Overall, these results highlight that evaluating and improving land-atmosphere coupling could potentially improve model performance across the globe. Springer-Verlag Berlin Heidelberg, 2014 Land-atmosphere interaction nationallicence Surface exchange coefficient nationallicence Surface coupling strength nationallicence Surface fluxes nationallicence Mesoscale convection nationallicence PBL nationallicence Zheng Yue Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 47907, West Lafayette, IN, USA aut Kumar Anil Hydrological Science Branch, NASA GSFC, Greenbelt, MD, USA aut Niyogi Dev Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 47907, West Lafayette, IN, USA aut Climate Dynamics Springer Berlin Heidelberg 44/9-10(2015-05-01), 2383-2409 0930-7575 44:9-10<2383 2015 44 382 https://doi.org/10.1007/s00382-014-2442-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2442-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zheng Yue Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 47907, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Kumar Anil Hydrological Science Branch, NASA GSFC, Greenbelt, MD, USA aut NATIONALLICENCE 700 1- Niyogi Dev Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 47907, West Lafayette, IN, USA aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/9-10(2015-05-01), 2383-2409 0930-7575 44:9-10<2383 2015 44 382