气候变化领域集成服务门户(CCPortal): Spatial and temporal patterns of land loss in the Lower Mississippi River Delta from 1983 to 2016

CCPortal

DOI	10.1016/j.rse.2020.112046
	Spatial and temporal patterns of land loss in the Lower Mississippi River Delta from 1983 to 2016
	Roy S.; Robeson S.M.; Ortiz A.C.; Edmonds D.A.
发表日期	2020
ISSN	00344257
卷号	250
英文摘要	The Mississippi Delta in coastal Louisiana has some of the highest rates of land loss in the world. This land-loss crisis might become a global problem because most major deltas are expected to be vulnerable to land loss during the remainder of the 21st century and beyond. Despite this predicament, we do not understand how land loss in a deltaic environment proceeds in time and space. Here, we evaluate the spatial and temporal trends of land loss in the Lower Mississippi River Delta (LMRD) region using spatial statistics and landscape metrics. We used nearly 4800 Landsat images to construct a series of three-year cloud-free composites from 1983 to 2016. From these data, we created a stability index (SI), which is a dimensionless measure of the number of land-to-water transitions that a land pixel makes before being considered lost. Our results indicate that on the LMRD, 75% of land loss is a single transition from land to water, while about 25% of land pixels have two or more transitions before being considered lost. Using a local indicator of spatial association, we show that pixels with similar SI tend to cluster together. Single transition clusters (low SI) form elongated shapes, they are densely packed, and they are predominantly, but not always, found on marsh edges. On the other hand, multi-transition clusters (high SI) form square-like shapes, they are more fragmented, and they are usually found in marsh interiors. Our analysis further shows that the land-loss area within the spatial patches with both high and low stability is strongly related to the density of land patches and their shape (R2 of 0.717 and 0.545 respectively). Our analysis suggests that land-loss pixels on the marsh edges undergo different temporal patterns of land loss compared to those in the marsh interior. We hypothesize that this arises because wave edge-erosion drives land loss on marsh edges, whereas subsidence-related flooding drives land loss in marsh interiors. The stability index provides a useful way to characterize the processes causing land loss. © 2020 Elsevier Inc.
英文关键词	Fragmentation; Fragstats; Google earth engine; Land loss; Landsat; LISA
语种	英语
scopus关键词	Digital storage; Wetlands; Coastal Louisiana; Landscape metrics; Mississippi delta; Spatial and temporal patterns; Spatial and temporal trends; Spatial associations; Spatial statistics; Stability indices; Pixels; coastal zone; edge effect; flooding; geomorphological response; land use change; Landsat; landscape change; marsh; pixel; satellite imagery; spatiotemporal analysis; subsidence; Louisiana; Mississippi Delta; United States
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179139
作者单位	Department of Geography, Indiana University, Bloomington, United States; Department of Geology, Colby College, Waterville, ME, United States; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, United States
推荐引用方式 GB/T 7714	Roy S.,Robeson S.M.,Ortiz A.C.,et al. Spatial and temporal patterns of land loss in the Lower Mississippi River Delta from 1983 to 2016[J],2020,250.
APA	Roy S.,Robeson S.M.,Ortiz A.C.,&Edmonds D.A..(2020).Spatial and temporal patterns of land loss in the Lower Mississippi River Delta from 1983 to 2016.Remote Sensing of Environment,250.
MLA	Roy S.,et al."Spatial and temporal patterns of land loss in the Lower Mississippi River Delta from 1983 to 2016".Remote Sensing of Environment 250(2020).