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Title: Evaluation of CLM4 Solar Radiation Partitioning Scheme Using Remote Sensing and Site Level FPAR Datasets

Journal Article · · Remote Sensing
DOI:https://doi.org/10.3390/rs5062857· OSTI ID:1376647
 [1];  [2];  [1];  [2];  [2];  [3];  [3]
  1. Univ. of Texas, Austin, TX (United States). Dept. of Geological Sciences
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Climate Change Science Inst.
  3. Boston Univ., MA (United States). Dept. of Earth and Environment

This paper examines a land surface solar radiation partitioning scheme, i.e., that of the Community Land Model version 4 (CLM4) with coupled carbon and nitrogen cycles. Taking advantage of a unique 30-year fraction of absorbed photosynthetically active radiation (FPAR) dataset derived from the Global Inventory Modeling and Mapping Studies (GIMMS) normalized difference vegetation index (NDVI) data set, multiple other remote sensing datasets, and site level observations, we evaluated the CLM4 FPAR ’s seasonal cycle, diurnal cycle, long-term trends and spatial patterns. These findings show that the model generally agrees with observations in the seasonal cycle, long-term trends, and spatial patterns, but does not reproduce the diurnal cycle. Discrepancies also exist in seasonality magnitudes, peak value months, and spatial heterogeneity. Here, we identify the discrepancy in the diurnal cycle as, due to, the absence of dependence on sun angle in the model. Implementation of sun angle dependence in a one-dimensional (1-D) model is proposed. The need for better relating of vegetation to climate in the model, indicated by long-term trends, is also noted. Evaluation of the CLM4 land surface solar radiation partitioning scheme using remote sensing and site level FPAR datasets provides targets for future development in its representation of this naturally complicated process.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-00OR22725; FG02-01ER63198
OSTI ID:
1376647
Journal Information:
Remote Sensing, Vol. 5, Issue 6; ISSN 2072-4292
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (11)

Recent literature in cartography and geographic information science journal January 2014
Environmental drivers of drought deciduous phenology in the Community Land Model journal January 2015
Seasonal effects of irrigation on land–atmosphere latent heat, sensible heat, and carbon fluxes in semiarid basin journal January 2017
Ecohydrological effects of stream–aquifer water interaction: a case study of the Heihe River basin, northwestern China journal January 2016
Recent literature in cartography and geographic information science journal September 2013
Environmental drivers of drought deciduous phenology in the Community Land Model journal January 2015
Seasonal effects of irrigation on land-atmosphere latent heat, sensible heat and carbon fluxes in semi-arid basin journal October 2016
Eco-hydrological effects of stream-aquifer water interaction: A case study of the Heihe River Basin, northwestern China posted_content January 2016
Recent literature in cartography and geographic information science journal December 2014
Recent literature in cartography and geographic information science journal April 2014
Harmonization of Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) from Sea-ViewingWide Field-of-View Sensor (SeaWiFS) and Medium Resolution Imaging Spectrometer Instrument (MERIS) journal July 2013

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