育空-库斯库温三角洲春季海冰浓度的年代际变化与夏季温度和NDVI有关

IF 1.6 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Amy S. Hendricks, Uma S. Bhatt, Gerald V. Frost, Donald A. Walker, Peter A. Bieniek, Martha K. Raynolds, Rick T. Lader, Howard E. Epstein, Jorge E. Pinzon, Compton J. Tucker, Josefino C. Comiso
{"title":"育空-库斯库温三角洲春季海冰浓度的年代际变化与夏季温度和NDVI有关","authors":"Amy S. Hendricks, Uma S. Bhatt, Gerald V. Frost, Donald A. Walker, Peter A. Bieniek, Martha K. Raynolds, Rick T. Lader, Howard E. Epstein, Jorge E. Pinzon, Compton J. Tucker, Josefino C. Comiso","doi":"10.1175/ei-d-23-0002.1","DOIUrl":null,"url":null,"abstract":"Abstract Rapidly warming temperatures in the Arctic are driving increasing tundra vegetation productivity, evidenced in both the satellite derived Normalized Difference Vegetation Index (NDVI) imagery and field studies. These trends, however, are not uniformly positive across the circumpolar Arctic. One notable region of negative linear NDVI trends that have persisted over the last 15 years is southwest Alaska’s Yukon-Kuskokwim Delta (YKD). Negative NDVI trends in the YKD region appear inconsistent with our understanding since tundra vegetation is temperature-limited and air temperatures have increased on the YKD. Analysis over a 40-year record from 1982-2021 reveals distinct decadal variability in the NDVI time series, which continues to produce negative linear trends. Similar decadal variability is also evident in summer warmth and 100-km coastal zone spring sea-ice concentrations. This suggests that decadal climate variations can dominate the trends of NDVI through their influence on the drivers of tundra vegetation, namely coastal sea-ice concentrations and summer warmth. The relationships among sea-ice, summer warmth, and NDVI have changed over the 40-year record. Seasonality analysis since 1982 shows declining sea-ice concentration in spring is followed by trends of increasing temperatures, but weakly declining NDVI during the growing season. An additional key finding is that since early 2010s, the relationships between sea-ice concentration and summer warmth, and sea-ice concentration and NDVI have strengthened, while the relationship between NDVI and summer warmth has weakened, indicating that temperature may no longer be the primary limiting factor for Arctic tundra vegetation on the YKD.","PeriodicalId":51020,"journal":{"name":"Earth Interactions","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Decadal variability in spring sea-ice concentration linked to summer temperature and NDVI on the Yukon-Kuskokwim Delta\",\"authors\":\"Amy S. Hendricks, Uma S. Bhatt, Gerald V. Frost, Donald A. Walker, Peter A. Bieniek, Martha K. Raynolds, Rick T. Lader, Howard E. Epstein, Jorge E. Pinzon, Compton J. Tucker, Josefino C. Comiso\",\"doi\":\"10.1175/ei-d-23-0002.1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Rapidly warming temperatures in the Arctic are driving increasing tundra vegetation productivity, evidenced in both the satellite derived Normalized Difference Vegetation Index (NDVI) imagery and field studies. These trends, however, are not uniformly positive across the circumpolar Arctic. One notable region of negative linear NDVI trends that have persisted over the last 15 years is southwest Alaska’s Yukon-Kuskokwim Delta (YKD). Negative NDVI trends in the YKD region appear inconsistent with our understanding since tundra vegetation is temperature-limited and air temperatures have increased on the YKD. Analysis over a 40-year record from 1982-2021 reveals distinct decadal variability in the NDVI time series, which continues to produce negative linear trends. Similar decadal variability is also evident in summer warmth and 100-km coastal zone spring sea-ice concentrations. This suggests that decadal climate variations can dominate the trends of NDVI through their influence on the drivers of tundra vegetation, namely coastal sea-ice concentrations and summer warmth. The relationships among sea-ice, summer warmth, and NDVI have changed over the 40-year record. Seasonality analysis since 1982 shows declining sea-ice concentration in spring is followed by trends of increasing temperatures, but weakly declining NDVI during the growing season. An additional key finding is that since early 2010s, the relationships between sea-ice concentration and summer warmth, and sea-ice concentration and NDVI have strengthened, while the relationship between NDVI and summer warmth has weakened, indicating that temperature may no longer be the primary limiting factor for Arctic tundra vegetation on the YKD.\",\"PeriodicalId\":51020,\"journal\":{\"name\":\"Earth Interactions\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2023-10-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Earth Interactions\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1175/ei-d-23-0002.1\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Earth Interactions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1175/ei-d-23-0002.1","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 1

摘要

北极地区快速变暖的气温正在推动苔原植被生产力的提高,这在卫星导出的归一化植被指数(NDVI)图像和野外研究中都得到了证明。然而,这些趋势在北极圈内并不都是积极的。在过去的15年里,阿拉斯加西南部的育空-库斯库维姆三角洲(YKD)是NDVI呈负线性趋势的一个值得注意的地区。YKD地区NDVI的负趋势似乎与我们的理解不一致,因为冻土带植被受温度限制,而气温在YKD上升高。对1982-2021年40年记录的分析显示,NDVI时间序列的年代际变化明显,并继续产生负线性趋势。类似的年代际变化在夏季温暖和100公里海岸带春季海冰浓度方面也很明显。这表明,年代际气候变化可以通过其对苔原植被驱动因素(即沿海海冰浓度和夏季温暖)的影响来主导NDVI的趋势。海冰、夏季温暖和NDVI之间的关系在40年的记录中发生了变化。1982年以来的季节性分析表明,春季海冰浓度下降后,温度呈上升趋势,而生长季NDVI下降较弱。另一个重要发现是,自2010年代初以来,海冰浓度与夏季温暖、海冰浓度与NDVI之间的关系增强,而NDVI与夏季温暖之间的关系减弱,表明温度可能不再是北极苔原植被对YKD的主要限制因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Decadal variability in spring sea-ice concentration linked to summer temperature and NDVI on the Yukon-Kuskokwim Delta
Abstract Rapidly warming temperatures in the Arctic are driving increasing tundra vegetation productivity, evidenced in both the satellite derived Normalized Difference Vegetation Index (NDVI) imagery and field studies. These trends, however, are not uniformly positive across the circumpolar Arctic. One notable region of negative linear NDVI trends that have persisted over the last 15 years is southwest Alaska’s Yukon-Kuskokwim Delta (YKD). Negative NDVI trends in the YKD region appear inconsistent with our understanding since tundra vegetation is temperature-limited and air temperatures have increased on the YKD. Analysis over a 40-year record from 1982-2021 reveals distinct decadal variability in the NDVI time series, which continues to produce negative linear trends. Similar decadal variability is also evident in summer warmth and 100-km coastal zone spring sea-ice concentrations. This suggests that decadal climate variations can dominate the trends of NDVI through their influence on the drivers of tundra vegetation, namely coastal sea-ice concentrations and summer warmth. The relationships among sea-ice, summer warmth, and NDVI have changed over the 40-year record. Seasonality analysis since 1982 shows declining sea-ice concentration in spring is followed by trends of increasing temperatures, but weakly declining NDVI during the growing season. An additional key finding is that since early 2010s, the relationships between sea-ice concentration and summer warmth, and sea-ice concentration and NDVI have strengthened, while the relationship between NDVI and summer warmth has weakened, indicating that temperature may no longer be the primary limiting factor for Arctic tundra vegetation on the YKD.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Earth Interactions
Earth Interactions 地学-地球科学综合
CiteScore
2.70
自引率
5.00%
发文量
16
审稿时长
>12 weeks
期刊介绍: Publishes research on the interactions among the atmosphere, hydrosphere, biosphere, cryosphere, and lithosphere, including, but not limited to, research on human impacts, such as land cover change, irrigation, dams/reservoirs, urbanization, pollution, and landslides. Earth Interactions is a joint publication of the American Meteorological Society, American Geophysical Union, and American Association of Geographers.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信