Elucidating the impact of temperature variability and extremes on cereal croplands through remote sensing
Elucidating the impact of temperature variability and extremes on cereal croplands through remote sensing
Remote sensing-derived wheat crop yield-climate models were developed to highlight the impact of temperature variation during thermo-sensitive periods (anthesis and grain-filling; TSP) of wheat crop development. Specific questions addressed are: can the impact of temperature variation occurring during the TSP on wheat crop yield be detected using remote sensing data and what is the impact? Do crop critical temperature thresholds during TSP exist in real world cropping landscapes? These questions are tested in one of the world's major wheat breadbaskets of Punjab and Haryana, north-west India. Warming average minimum temperatures during the TSP had a greater negative impact on wheat crop yield than warming maximum temperatures. Warming minimum and maximum temperatures during the TSP explain a greater amount of variation in wheat crop yield than average growing season temperature. In complex real world cereal croplands there was a variable yield response to critical temperature threshold exceedance, specifically a more pronounced negative impact on wheat yield with increased warming events above 35 °C. The negative impact of warming increases with a later start-of-season suggesting earlier sowing can reduce wheat crop exposure harmful temperatures. However, even earlier sown wheat experienced temperature-induced yield losses, which, when viewed in the context of projected warming up to 2100 indicates adaptive responses should focus on increasing wheat tolerance to heat. This study shows it is possible to capture the impacts of temperature variation during the TSP on wheat crop yield in real world cropping landscapes using remote sensing data; this has important implications for monitoring the impact of climate change, variation and heat extremes on wheat croplands.
climate change, climate extremes, crop yield, remote sensing, temperature, wheat
1-11
Duncan, John
f860e50d-0297-45fd-873c-6b57ff6d6d46
Dash, Jadunandan
51468afb-3d56-4d3a-aace-736b63e9fac8
Atkinson, Peter M.
96e96579-56fe-424d-a21c-17b6eed13b0b
April 2015
Duncan, John
f860e50d-0297-45fd-873c-6b57ff6d6d46
Dash, Jadunandan
51468afb-3d56-4d3a-aace-736b63e9fac8
Atkinson, Peter M.
96e96579-56fe-424d-a21c-17b6eed13b0b
Duncan, John, Dash, Jadunandan and Atkinson, Peter M.
(2015)
Elucidating the impact of temperature variability and extremes on cereal croplands through remote sensing.
Global Change Biology, .
(doi:10.1111/gcb.12660).
Abstract
Remote sensing-derived wheat crop yield-climate models were developed to highlight the impact of temperature variation during thermo-sensitive periods (anthesis and grain-filling; TSP) of wheat crop development. Specific questions addressed are: can the impact of temperature variation occurring during the TSP on wheat crop yield be detected using remote sensing data and what is the impact? Do crop critical temperature thresholds during TSP exist in real world cropping landscapes? These questions are tested in one of the world's major wheat breadbaskets of Punjab and Haryana, north-west India. Warming average minimum temperatures during the TSP had a greater negative impact on wheat crop yield than warming maximum temperatures. Warming minimum and maximum temperatures during the TSP explain a greater amount of variation in wheat crop yield than average growing season temperature. In complex real world cereal croplands there was a variable yield response to critical temperature threshold exceedance, specifically a more pronounced negative impact on wheat yield with increased warming events above 35 °C. The negative impact of warming increases with a later start-of-season suggesting earlier sowing can reduce wheat crop exposure harmful temperatures. However, even earlier sown wheat experienced temperature-induced yield losses, which, when viewed in the context of projected warming up to 2100 indicates adaptive responses should focus on increasing wheat tolerance to heat. This study shows it is possible to capture the impacts of temperature variation during the TSP on wheat crop yield in real world cropping landscapes using remote sensing data; this has important implications for monitoring the impact of climate change, variation and heat extremes on wheat croplands.
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- Author's Original
More information
Accepted/In Press date: 5 June 2014
e-pub ahead of print date: 4 July 2014
Published date: April 2015
Keywords:
climate change, climate extremes, crop yield, remote sensing, temperature, wheat
Organisations:
Global Env Change & Earth Observation
Identifiers
Local EPrints ID: 367552
URI: http://eprints.soton.ac.uk/id/eprint/367552
ISSN: 1354-1013
PURE UUID: 2a295ca1-fd68-4bdc-b7e3-1adda463244a
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Date deposited: 20 Aug 2014 10:39
Last modified: 15 Mar 2024 03:17
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Contributors
Author:
John Duncan
Author:
Peter M. Atkinson
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