DOI: 10.1002/2014MS000322
Scopus记录号: 2-s2.0-85027940489
论文题名: Impact of precipitation-induced sensible heat on the simulation of land-surface air temperature
作者: Wei N ; , Dai Y ; , Zhang M ; , Zhou L ; , Ji D ; , Zhu S ; , Wang L
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2014
卷: 6, 期: 4 起始页码: 1311
结束页码: 1320
语种: 英语
英文关键词: Oceanography
; Surface measurement
; Surface properties
; Surface waters
; Heavy precipitation
; Intertropical convergence zone
; Land surface
; Land surface air temperatures
; Sea surface temperature (SST)
; Sensible heat
; Surface air temperatures
; Temperature changes
; Atmospheric temperature
; air temperature
; intertropical convergence zone
; land surface
; precipitation (climatology)
; rainwater
; sensible heat flux
; standing wave
英文摘要: Precipitation-induced sensible heat (HPR) which is transferred between the land surface and rainwater can be extremely large during a heavy precipitation event. Thus, the local surface temperature can be sharply altered on an hourly to daily timescale. However, HPR is commonly neglected in current land surface models because of its small magnitude on long timescales. As a consequence, the simulated land-surface air temperature (TLSA) may be biased. In this study, we use satellite and reanalysis data sets to estimate HPR on the global scale, and we use CESM1 (with CAM4 physics and the prescribed sea surface temperature) to investigate the effect of HPR on TLSA simulations over the second half of the 20th century. Our results show that the reanalysis-estimated HPR is largest over Intertropical Convergence Zone (ITCZ) regions, with seasonal mean values of -0.22 W m-2 (-2.31 to 0.29 W m-2) in DJF and -0.28 W m-2 (-2.89 to 0.24 W m-2) in JJA. These values are consistent with the model-simulated HPR patterns. In DJF, the HPR leads to a weaker equator-pole surface heating difference and therefore, weakens northern stationary waves. The consequent changes of the heat and moisture advection result in noticeable TLSA warming effects (for example, +0.53 K over northern Eurasia and +0.46 K over central North America) and cooling effects (for example, -0.62 K over Alaska and -0.42 K over central Asia) at regional scales. These temperature changes help to reduce the TLSA biases in the model. In JJA, the TLSA changes slightly because of the weak stationary wave responses during the northern summer. Key Points: HPR is calculated on a global long-term scale with a large amount in the ITCZ HPR induces appreciable regional impact on TLSA simulation in northern winter HPR helps to reduce TLSA simulation biases by up to 1 K at continental scales © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76072
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States; Department of Atmospheric and Environmental Sciences, State University of New York at Albany, Albany, NY, United States
Recommended Citation:
Wei N,, Dai Y,, Zhang M,et al. Impact of precipitation-induced sensible heat on the simulation of land-surface air temperature[J]. Journal of Advances in Modeling Earth Systems,2014-01-01,6(4)