- 1、本文档共88页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
ChangesintheArctic:
BackgroundandIssuesforCongress
UpdatedJuly30,2024
CongressionalResearchService
R41153
ChangesintheArctic:BackgroundandIssuesforCongress
Summary
ThediminishmentofArcticseaicehasledtoincreasedhumanactivitiesintheArctic,andhas
heightenedinterestin,andconcernsabout,theregion’sfuture.TheUnitedStates,byvirtueof
Alaska,isanArcticcountryandhassubstantialinterestsintheregion.ThesevenotherArctic
statesareRussia,Canada,Iceland,Denmark(byvirtueofGreenland),Norway,Sweden,and
Finland.TheArcticResearchandPolicyAct(ARPA)of1984(TitleIofP.L.98-373ofJuly31,
1984)“provide[s]foracomprehensivenationalpolicydealingwithnationalresearchneedsand
objectivesintheArctic.”TheNationalScienceFoundation(NSF)istheleadfederalagencyfor
implementingArcticresearchpolicy.TheArcticCouncil,createdin1996,istheleading
internationalforumforaddressingissuesrelatingtotheArctic.TheUnitedNationsConvention
ontheLawoftheSea(UNCLOS)setsforthacomprehensiveregimeoflawandorderinthe
world’soceans,includingtheArcticOcean.TheUnitedStatesisnotapartytoUNCLOS.
AnarrayofclimatechangesintheArcticisnowdocumentedbyobservingsystems,withmore
expectedwithfuturegreenhousegas-drivenclimatechange.Observedphysicalchangesinthe
Arcticincludewarmingocean,soil,andairtemperatures;meltingpermafrost;shiftingvegetation
andanimalabundances;andalteredcharacteristicsofArcticcyclones.Amonitoringreportofthe
ArcticCouncilconcludedin2019that“theArcticbiophysicalsystemisnowclearlytrending
文档评论(0)