气候变化领域集成服务门户(CCPortal): Identifying the sources of continental summertime temperature variance using a diagnostic model of land

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DOI	10.1175/JCLI-D-19-0276.1
	Identifying the sources of continental summertime temperature variance using a diagnostic model of land–atmosphere interactions
	Zeppetello L.R.V.; Tétreault-Pinard É.; Battisti D.S.; Baker M.B.
发表日期	2020
ISSN	0894-8755
起始页码	3547
结束页码	3564
卷号	33 期号:9
英文摘要	Climate models show that soil moisture and its subseasonal fluctuations have important impacts on the surface latent heat flux, thus regulating surface temperature variations. Using correlations between monthly anomalies in net absorbed radiative fluxes, precipitation, 2-m air temperature, and soil moisture in the ERA-Interim reanalysis and the HadCM3 climate model, we develop a linear diagnostic model to quantify the major effects of land–atmosphere interactions on summertime surface temperature variability. The spatial patterns in 2-m air temperature and soil moisture variance from the diagnostic model are consistent with those from the products from which it was derived, although the diagnostic model generally underpredicts soil moisture variance. We use the diagnostic model to quantify the impact of soil moisture, shortwave radiation, and precipitation anomalies on temperature variance in wet and dry regions. Consistent with other studies, we find that fluctuations in soil moisture amplify temperature variance in dry regions through their impact on latent heat flux, whereas in wet regions temperature variability is muted because of high mean evapotranspiration rates afforded by plentiful surface soil moisture. We demonstrate how the diagnostic model can be used to identify sources of temperature variance bias in climate models. © 2020 American Meteorological Society.
英文关键词	Climate models; Diagnostic products; Heat flux; Latent heat; Soil moisture; Soil surveys; Surface properties; Precipitation anomalies; Short-wave radiation; Surface latent heat fluxes; Surface soil moisture; Surface temperature variation; Surface temperatures; Temperature variability; Temperature variance; Atmospheric temperature; boundary layer; climate modeling; correlation; land-atmosphere interaction; latent heat flux; soil moisture; summer; surface temperature
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171346
作者单位	Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
推荐引用方式 GB/T 7714	Zeppetello L.R.V.,Tétreault-Pinard É.,Battisti D.S.,等. Identifying the sources of continental summertime temperature variance using a diagnostic model of land–atmosphere interactions[J],2020,33(9).
APA	Zeppetello L.R.V.,Tétreault-Pinard É.,Battisti D.S.,&Baker M.B..(2020).Identifying the sources of continental summertime temperature variance using a diagnostic model of land–atmosphere interactions.Journal of Climate,33(9).
MLA	Zeppetello L.R.V.,et al."Identifying the sources of continental summertime temperature variance using a diagnostic model of land–atmosphere interactions".Journal of Climate 33.9(2020).