Journal of Food, Agriculture and Environment
Vol 11,
Issue 1,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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The cold-humid effect of perennially flooded marshes on clear days in the Sanjiang Plain of Northeast China
Author(s):
Xiaomei Yin,
Weiwei Chen, Xiuli Gong, Wen Hong, Yiyong Wang *Recieved Date: 2012-09-08, Accepted Date: 2013-01-20
Abstract:Understanding the micro-climate of a marsh ecosystem helps elucidate the functional and biogeochemical processes of the ecosystem. This study combines field measurements and 2-D atmospheric models to investigate the characteristics of air temperature and relative humidity at the surface of a perennially flooded marsh. We found that the marsh air temperature was lower and the relative humidity was higher than the surrounding farmlands, which reflects the significant cold-humid effect of marshes. With increasing distance from the marsh, the cold-humid effect became weaker. The daily variation of air temperature and relative humidity between the marsh and farmlands was similar, with the biggest difference occurring between 12:00 and 14:00 (local standard time) at a height of 0.5 m above ground. The seasonal variation of the cold-humid effect was clear and most significant in July. The numerical model was effective at simulating the profiles of potential temperature and specific humidity under 1000 m over marsh area. The simulated potential temperature was more accurate than the specific humidity.
Keywords:Marsh,
temperature, humidity, underlying surface, microclimate, land-use, the Sanjiang PlainJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Environment
Pages: 835-840
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