Measuring soil moisture content non-invasively at intermediate spatial scale using cosmic-ray neutrons

被引：372

作者：

Zreda, Marek ^{[1
]}

Desilets, Darin ^{[1
]}

Ferre, T. P. A. ^{[1
]}

Scott, Russell L. ^{[2
]}

机构：

[1] Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA

[2] ARS, SW Watershed Res Ctr, USDA, Tucson, AZ 85719 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1029/2008GL035655

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Soil moisture content on a horizontal scale of hectometers and at depths of decimeters can be inferred from measurements of low-energy cosmic-ray neutrons that are generated within soil, moderated mainly by hydrogen atoms, and diffused back to the atmosphere. These neutrons are sensitive to water content changes, but largely insensitive to variations in soil chemistry, and their intensity above the surface is inversely correlated with hydrogen content of the soil. The management with a portable neutron detector placed a few meters above the ground takes minutes to hours, permitting high-resolution, long-term monitoring of undistributed soil moisture conditions. The large footprint makes the method suitable for weather and short-term climate forecast intialization and for calibration of satellite sensors, and the measurement a-depth makes the probe ideal for studies of plant/soil interaction and atmosphere/soil exchange. Citation: Zreda, M., D. Desilets, T. P. A. Ferre, and R. L. Scott (2008), Measuring soil moisture content non-invasively at intermediate spatial scale using cosmic-ray neutrons, Geophys. Res. Lett., 35, L21402, doi: 10.1029/2008GL035655.

引用

页数：5

共 32 条

[11]

0798:VILSWB&gt

[12]

2.0.CO

[13]

[14] The hydrosphere state (Hydros) satellite mission: An earth system pathfinder for global mapping of soil moisture and land freeze/thaw [J].

Entekhabi, D ;

Njoku, EG ;

Houser, P ;

Spencer, M ;

Doiron, T ;

Kim, YJ ;

Smith, J ;

Girard, R ;

Belair, S ;

Crow, WT ;

Jackson, TJ ;

Kerr, YH ;

Kimball, JS ;

Koster, R ;

McDonald, KC ;

O'Neill, PE ;

Pultz, T ;

Running, SW ;

Shi, JC ;

Wood, E ;

van Zyl, J .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2004, 42 (10) :2184-2195

[15] Temporal and spatial scales of observed soil moisture variations in the extratropics [J].

Entin, JK ;

Robock, A ;

Vinnikov, KY ;

Hollinger, SE ;

Liu, SX ;

Namkhai, A .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2000, 105 (D9) :11865-11877

[16]

FABRYKAMARTIN JT, 1988, THESIS U ARIZ TUCSON

[17] Field observations of soil moisture variability across scales [J].

Famiglietti, James S. ;

Ryu, Dongryeol ;

Berg, Aaron A. ;

Rodell, Matthew ;

Jackson, Thomas J. .

WATER RESOURCES RESEARCH, 2008, 44 (01)

[18] Ground-based investigation of soil moisture variability within remote sensing footprints during the Southern Great Plains 1997 (SGP97) Hydrology Experiment [J].

Famiglietti, JS ;

Devereaux, JA ;

Laymon, CA ;

Tsegaye, T ;

Houser, PR ;

Jackson, TJ ;

Graham, ST ;

Rodell, M ;

van Oevelen, PJ .

WATER RESOURCES RESEARCH, 1999, 35 (06) :1839-1851

[19] The European summer of 2003: Sensitivity to soil water initial conditions [J].

Ferranti, Laura ;

Viterbo, Pedro .

JOURNAL OF CLIMATE, 2006, 19 (15) :3659-3680

[20]

Glasstone S., 1952, The Elements of Nuclear Reactor Theory

← 1 2 3 4 →