DOI: 10.5194/hess-24-3431-2020
论文题名: Assimilation of vegetation optical depth retrievals from passive microwave radiometry
作者: Kumar S.V. ; Holmes T.R. ; Bindlish R. ; De Jeu R. ; Peters-Lidard C.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 7 起始页码: 3431
结束页码: 3450
语种: 英语
Scopus关键词: Agricultural robots
; Evapotranspiration
; Microwaves
; Optical properties
; Soil moisture
; Vegetation
; Video on demand
; Controlling factors
; Data assimilation systems
; Land surface modeling
; Passive microwave radiometry
; Passive microwave sensors
; Soil moisture active passive (SMAP)
; Surface soil moisture
; Vegetation optical depth
; Microwave sensors
; agricultural land
; canopy architecture
; carbon flux
; evapotranspiration
; microwave radiation
; optical depth
; radiometric survey
; sensor
; soil moisture
; vegetation structure
; water flux
英文摘要: Vegetation optical depth (VOD) retrievals from passive microwave sensors provide analog estimates of above-ground canopy biomass. This study presents the development and analysis of assimilating VOD retrievals from X-, C-, and L-band passive microwave instruments within the Noah-MP land surface model over the Continental U.S. The results from this study demonstrate that the assimilation of VOD retrievals have a significant beneficial impact on the simulation of evapotranspiration and GPP, particularly over the agricultural areas of the U.S. The improvements in the water and carbon fluxes from the assimilation of VOD from X- and C-band sensors are found to be comparable to those obtained from the assimilation of vegetation indices from optical sensors. The study also quantifies the relative and joint impacts of assimilating surface soil moisture and VOD from the Soil Moisture Active Passive (SMAP) mission. The utility of soil moisture assimilation for improving evapotranspiration (ET) is more significant over water-limited regions, whereas VOD DA is more impactful over areas where soil moisture is not the primary controlling factor on ET. The results also indicate that the information on moisture and vegetation states from SMAP can be simultaneously exploited through the joint assimilation of surface soil moisture and VOD. Since passive microwave-based VOD retrievals are available in nearly all weather conditions, their use within data assimilation systems offers the ability to extend and improve the utility obtained from the use of optical/infrared-based vegetation retrievals. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162648
Appears in Collections: 气候变化与战略
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作者单位: Kumar, S.V., Hydrological Sciences Laboratory, Nasa Goddard Space Flight Center, Greenbelt, MD, United States; Holmes, T.R., Hydrological Sciences Laboratory, Nasa Goddard Space Flight Center, Greenbelt, MD, United States; Bindlish, R., Hydrological Sciences Laboratory, Nasa Goddard Space Flight Center, Greenbelt, MD, United States; De Jeu, R., Vandersat, Haarlem, Netherlands; Peters-Lidard, C., Hydrosphere Biosphere, and Geophysics, Earth Sciences Division at Nasa Gsfc, Greenbelt, MD, United States
Recommended Citation:
Kumar S.V.,Holmes T.R.,Bindlish R.,et al. Assimilation of vegetation optical depth retrievals from passive microwave radiometry[J]. Hydrology and Earth System Sciences,2020-01-01,24(7)