Details:

Journal Title:
Geoscientific Model Development
Personal Author:
Zhang, Zhe ; Li, Yanping ; Chen, Fei ; Harder, Phillip ; Helgason, Warren ; ... More +
Zhang, Zhe ; Li, Yanping ; Chen, Fei ; Harder, Phillip ; Helgason, Warren ; Famiglietti, James ; Valayamkunnath, Prasanth ; He, Cenlin ; Li, Zhenhua Less -
NOAA Program & Office:
OAR (Oceanic and Atmospheric Research)
Description:
The US Northern Great Plains and the Canadian Prairies are known as the world's breadbaskets for their large spring wheat production and exports to the world. It is essential to accurately represent spring wheat growing dynamics and final yield and improve our ability to predict food production under climate change. This study attempts to incorporate spring wheat growth dynamics into the Noah-MP crop model for a long time period (13 years) and fine spatial scale (4 km). The study focuses on three aspects: (1) developing and calibrating the spring wheat model at a point scale, (2) applying a dynamic planting and harvest date to facilitate large-scale simulations, and (3) applying a temperature stress function to assess crop responses to heat stress amid extreme heat. Model results are evaluated using field observations, satellite leaf area index (LAI), and census data from Statistics Canada and the United States Department of Agriculture (USDA). Results suggest that incorporating a dynamic planting and harvest threshold can better constrain the growing season, especially the peak timing and magnitude of wheat LAI, as well as obtain realistic yield compared to prescribing a static province/state-level map. Results also demonstrate an evident control of heat stress upon wheat yield in three Canadian Prairies Provinces, which are reasonably captured in the new temperature stress function. This study has important implications in terms of estimating crop yields, modeling the land–atmosphere interactions in agricultural areas, and predicting crop growth responses to increasing temperatures amidst climate change.
Keywords:
[+]
General Medicine
Source:
Geoscientific Model Development, 16(13), 3809-3825
DOI:
https://doi.org/10.5194/gmd-16-3809-2023
ISSN:
1991-9603
Format:
PDF
Publisher:
Copernicus GmbH
Document Type:
Journal Article
Funding:
Grant no. NA18OAR4590381
License:
https://creativecommons.org/licenses/by/4.0/
Rights Information:
CC BY
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:a2ba12533d30a9ae8b86dcbad37fc8231401be458f5164e7bbe75a69325b8e70
Download URL:
https://repository.library.noaa.gov/view/noaa/58453/noaa_58453_DS1.pdf
File Type:

Supporting Files

• Machine readable version (XML)

  xml

More +