Inferred bimodality in the distribution of soil moisture at Big Meadows, Shenandoah National Park, Virginia

被引:11
作者
Lee, TR [1 ]
Hornberger, GM [1 ]
机构
[1] Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA
关键词
D O I
10.1029/2005GL025536
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Recent work has shown that distinct steady-state modes of soil moisture frequency can occur resulting in soils being preferentially in either dry states or wet states. Bimodal distributions of summer soil moisture can be due to precipitation feedback, to variations in climate from early summer to late summer, or to interannual rainfall variability. We examined the frequency distribution in the Palmer Drought Severity Index at Big Meadows, which is a relatively flat, open area in the Blue Ridge Mountains of Virginia. We found that a pronounced bimodality exists not only during the summer months, but also during the remainder of the year. Furthermore, our analyses show that the bimodality in the distribution exists for the month of August alone, suggesting that there are intrinsically dry states and wet states and that the bimodality is not merely a result of climate differences from early to late summer.
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共 29 条
[1]  
ALLEY WM, 1984, J CLIM APPL METEOROL, V23, P1100, DOI 10.1175/1520-0450(1984)023<1100:TPDSIL>2.0.CO
[2]  
2
[3]  
Bradley C, 2000, HYDROL PROCESS, V14, P2945, DOI 10.1002/1099-1085(200011/12)14:16/17&lt
[4]  
2945::AID-HYP128&gt
[5]  
3.0.CO
[6]  
2-R
[7]   Preferential states of seasonal soil moisture: The impact of climate fluctuations [J].
D'Odorico, P ;
Ridolfi, L ;
Porporato, A ;
Rodriguez-Iturbe, I .
WATER RESOURCES RESEARCH, 2000, 36 (08) :2209-2219
[8]   Preferential states in soil moisture and climate dynamics [J].
D'Odorico, P ;
Porporato, A .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2004, 101 (24) :8848-8851
[9]  
Efron B., 1994, INTRO BOOTSTRAP, DOI DOI 10.1201/9780429246593
[10]   GENERALIZED WATERSHED LOADING FUNCTIONS FOR STREAM-FLOW NUTRIENTS [J].
HAITH, DA ;
SHOEMAKER, LL .
WATER RESOURCES BULLETIN, 1987, 23 (03) :471-478