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Title: Modeling the potential of the Northern China forest shelterbelt in improving hydroclimate conditions

Author: Liu, Yongqiang; Stanturf, John; Lu, Houquan;

Date: 2008

Source: Journal of the American Water Resources Association, 44(5): 1176-1192

Publication Series: Miscellaneous Publication

Description: The forest shelterbelt (afforestation) project in northern China is the most significant ecosystem project initiated in China during the past three decades. It aims to improve and conserve the ecological environment in the project areas. The tree belt stands along the southern edge of the sandy lands, nearly paralleling to the Great Wall. This study used a regional climate model to simulate the potential of improving regional hydroclimate conditions resulting from the afforestation project. Two simulations with preafforestation and postafforestation land cover were performed over East Asia from January 1987 to February 1988. The model resolution is 60 km. The differences between the two simulations suggest that the northern China forest shelterbelt project is likely to improve overall hydroclimate conditions by increasing precipitation, relative humidity, and soil moisture, and by reducing prevailing winds and air temperature. The effects are more significant in spring and summer than fall and winter. Changes in many hydrologic properties (e.g., evapotranspiration, soil moisture, and water yield), however, differ between the dry Northeast China and the moist Northeast China. The hydroclimate effects are also found in the surrounding areas, featured by noticeably moister conditions in the area south of the afforestation project. The results imply that the shelterbelt project would reduce water yield in afforested Northwest and North China during spring, but increase water yield in the afforested Northeast China as well as in the southern surrounding area, offset some greenhouse effects, and reduce the severity of dust storms. Possible improvements of this study by using actual afforestation data, modeling with higher resolution, longer integration and more detailed processes, and analyzing the physical mechanisms are discussed.

Keywords: afforestation, hydrology, climate, northern China forest shelterbelt, regional climate modeling

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Liu, Yongqiang; Stanturf, John; Lu, Houquan 2008. Modeling the potential of the Northern China forest shelterbelt in improving hydroclimate conditions. Journal of the American Water Resources Association, 44(5): 1176-1192


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