DOI: 10.1002/2014GL061745
论文题名: Radiative and precipitation controls on root zone soil moisture spectra
作者: Nakai T. ; Katul G.G. ; Kotani A. ; Igarashi Y. ; Ohta T. ; Suzuki M. ; Kumagai T.
刊名: Geophysical Research Letters
ISSN: 0094-9656
EISSN: 1944-9387
出版年: 2014
卷: 41, 期: 21 起始页码: 7546
结束页码: 7554
语种: 英语
英文关键词: black-noise
; decay time scale
; evaporative damping time scale
; red-noise
; soil moisture memory
; soil moisture spectra
Scopus关键词: Atmospheric radiation
; Damping
; Evapotranspiration
; Precipitation (meteorology)
; Soil moisture
; Time measurement
; White noise
; black-noise
; Damping time
; Decay time
; Precipitation controls
; Precipitation variability
; red-noise
; Root zone soil moistures
; Simultaneous precipitation
; Soil surveys
; climate modeling
; drainage
; evapotranspiration
; moisture content
; radiative forcing
; rhizosphere
; soil moisture
; temperate forest
; temporal variation
英文摘要: Temporal variability in root zone soil moisture content (w) exhibits a Lorentzian spectrum with memory dictated by a damping term when forced with white-noise precipitation. In the context of regional dimming, radiation and precipitation variability are needed to reproduce w trends prompting interest in how the w memory is altered by radiative forcing. A hierarchy of models that sequentially introduce the spectrum of precipitation, net radiation, and the effect of w on evaporative and drainage losses was used to analyze the spectrum of w at subtropical and temperate forested sites. Reproducing the w spectra at long time scales necessitated simultaneous precipitation and net radiation measurements depending on site conditions. The w memory inferred from observed w spectra was 25-38 days, larger than that determined from maximum wet evapotranspiration and field capacity. The w memory can be reasonably inferred from the Lorentzian spectrum when precipitation and evapotranspiration are in phase. Key PointsClimate models predict Lorentzian temporal spectra for root zone soil moisture wLong-term site measurements deviate from Lorentzian and report shorter w memoryPrecipitation and net radiation impact w spectra and its memory at long scales ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84912079118&doi=10.1002%2f2014GL061745&partnerID=40&md5=e74a6658c46c5f2a54e83b8922b79522
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6920
Appears in Collections: 气候减缓与适应
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作者单位: Hydrospheric Atmospheric Research Center, Nagoya University, Nagoya, Japan
Recommended Citation:
Nakai T.,Katul G.G.,Kotani A.,et al. Radiative and precipitation controls on root zone soil moisture spectra[J]. Geophysical Research Letters,2014-01-01,41(21).