Responses of stream nitrate and DOC loadings to hydrological forcing and climate change in an upland forest of the northeastern United States
Responses of stream nitrate and DOC loadings to hydrological forcing and climate change in an upland forest of the northeastern United States
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美国东北部高地森林溪流硝酸盐和 DOC 负荷对水文强迫和气候变化的响应
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Shanley
中科院分区：
文献类型：
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作者：
S. Sebestyen;E. Boyer;J. Shanley
气候、生长期流量（径流+20%，硝酸盐+57%，DOC +58%）增加了更多的降水（+28%）和快速流量（+39%），发生在生长季节（+43天）。在休眠期，水流和养分负荷减少。年净径流（+8%）和DOC负荷（+9%）的增加与年净降水（+7%）的平均增加幅度相称。年净水流和DOC负荷主要受休眠期降水增加的影响。相比之下，河流硝酸盐的年负荷量下降（- 2%）反映了生长季节控制对河流硝酸盐的影响更大，以及在气候变暖的情况下延长生长季节的影响。我们的研究结果表明，从集水区土壤中浸出的硝酸盐和DOC将受到人为气候强迫的影响，从而影响美国东北部年度河流负荷的时间和大小。
climate, growing season stream fluxes (runoff +20%, nitrate +57%, and DOC +58%) increaseasmoreprecipitation(+28%)andquickflow(+39%)occurduringalongergrowing season (+43 days). During the dormant season, stream water and nutrient loadings decrease. Net annual stream runoff (+8%) and DOC loading (+9%) increases are commensurate with the magnitude of the average increase of net annual precipitation (+7%). Net annual stream water and DOC loadings are primarily affected by increased dormant season precipitation. In contrast, decreased annual loading of stream nitrate (� 2%) reflects a larger effect of growing season controls on stream nitrate and the effects of lengthened growing seasons in a warmer climate. Our findings suggest that leaching of nitrate and DOC from catchment soils will be affected by anthropogenic climate forcing, thereby affecting the timing and magnitude of annual stream loadings in the northeastern United States.
影响因子：
11.6
作者：
Evans, Christopher D.;Chapman, Pippa J.;Cresser, Malcolm S.
通讯作者：
Cresser, Malcolm S.