+Modeling net primary productivity of ...

URL: http://portal.igg.ac.mn/dataset/0ca0c619-03bd-402b-8e4a-1f3759ca83e6/resource/1f2cf0a0-28a7-4b04-b4a5-e61e416cb41d/download/modeling-net-primary-productivity-of-terrestrial-ecosystems-in-the-2.1.pdf

Abstract: Since the estimate of moisture stress coefficients (MSC) in the current Carnegie-Ames-Stanford-Approach(CASA) model still requires considerable inputs from ground meteorological data and many soil param-eters, here we present a modified CASA model by introducing the land-surface water index (LSWI) andscaled precipitation to model the vegetation net primary productivity (NPP) in the arid and semiaridclimate of the Mongolian Plateau. The field-observed NPP data and a previously proposed model (theYu-CASA model) were used to evaluate the performance of our LSWI-based CASA model. The resultsshow that the NPP predicted by both the LSWI-based CASA model and the Yu-CASA model showed goodagreement with the observed NPP in the grassland ecosystems in the study area, with coefficients ofdetermination of 0.717 and 0.714, respectively. The LSWI-based CASA model also performed compara-bly with the Yu-CASA model at both biome and per-pixel scales when keeping other inputs unchanged,with a difference of approximately 16 g C in the growing-season total NPP and an average value of 2.3 g Cbias for each month. This indicates that, unlike an earlier method that estimated MSC based entirely onclimatic variables or a soil moisture model, the method proposed here simplifies the model structure,reduces the need for ground measurements, and can provide results comparable with those from earliermodels. The LSWI-based CASA model is potentially an alternative method for modelling NPP for a widerange of vegetation types in the Mongolian Plateau.

There are no views created for this resource yet.

Additional Information

Field Value
Data last updated September 21, 2018
Metadata last updated September 21, 2018
Created September 21, 2018
Format application/pdf
License Creative Commons Attribution
createdover 6 years ago
format.pdf
id1f2cf0a0-28a7-4b04-b4a5-e61e416cb41d
last modifiedover 6 years ago
mimetypeapplication/pdf
on same domainTrue
package id0ca0c619-03bd-402b-8e4a-1f3759ca83e6
revision id5a73ac91-471f-48c8-b36a-2877fda16179
size7 MiB
stateactive
url typeupload