Arid
DOI10.3389/feart.2018.00153
Evaluating Landscape Degradation Along Climatic Gradients During the 1930s Dust Bowl Drought From Panchromatic Historical Aerial Photographs, United States Great Plains
Bolles, Kasey C.; Forman, Steven L.
通讯作者Bolles, Kasey C.
来源期刊FRONTIERS IN EARTH SCIENCE
ISSN2296-6463
出版年2018
卷号6
英文摘要

The United States Great Plains (USGP) are some of the most productive rangelands globally and a significant carbon sink for the atmosphere, but grassland response to precipitation is highly variable and poorly constrained over time and space. There is a rich historical aerial photographic record of the USGP which provides an unparalleled view of past landscapes and allows for evaluation of surficial response to drought beyond the satellite record, such as during the 1930s Dust Bowl Drought (DBD). This study classified the extent and loci of surficial denudation from seamless mosaics of radiometrically corrected and georectified digitized aerial negatives acquired in the late 1930s from six counties distributed across USGP ecoregions. The dominant sources of degradation found for sites east of the 100th meridian are cultivated fields and fluvial deposits, associated with woody vegetation response to water availability in uncultivated areas. For sites to the west, denuded surfaces are predominantly eolian sandsheets and dunes, correlated with intensity of drought conditions and reduced plant diversity. Discrete spatial signatures of the drought are observed not only within the classically recognized southern Dust Bowl area, but also in the northern and central plains. Statistical analyses of site variability suggest landscape response to the DBD is most strongly influenced by the arid-humid divide and severity of precipitation and temperature anomalies. With a projected increase 21st century aridity, eolian processes cascading across western grasslands, like during the Dust Bowl, may significantly impact future dust particle emission and land and carbon storage management.


英文关键词Dust Bowl Drought historical aerial photographs grassland processes United States Great Plains landscape degradation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000447417200001
WOS关键词NORTH-AMERICAN DROUGHT ; STRUCTURE-FROM-MOTION ; IMAGE-ANALYSIS ; SPATIAL HETEROGENEITY ; DUNE ACTIVITY ; TREE-RINGS ; SAND HILLS ; LAND-COVER ; RECORD ; PRECIPITATION
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209412
作者单位Baylor Univ, Dept Geosci, Waco, TX 76798 USA
推荐引用方式
GB/T 7714
Bolles, Kasey C.,Forman, Steven L.. Evaluating Landscape Degradation Along Climatic Gradients During the 1930s Dust Bowl Drought From Panchromatic Historical Aerial Photographs, United States Great Plains[J],2018,6.
APA Bolles, Kasey C.,&Forman, Steven L..(2018).Evaluating Landscape Degradation Along Climatic Gradients During the 1930s Dust Bowl Drought From Panchromatic Historical Aerial Photographs, United States Great Plains.FRONTIERS IN EARTH SCIENCE,6.
MLA Bolles, Kasey C.,et al."Evaluating Landscape Degradation Along Climatic Gradients During the 1930s Dust Bowl Drought From Panchromatic Historical Aerial Photographs, United States Great Plains".FRONTIERS IN EARTH SCIENCE 6(2018).
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