“地球科学前沿”学术报告第2018-02期

应兰州大学地质科学与矿产资源学院王金荣教授和郭雪莲副教授邀请,美国俄勒冈大学地球科学院GregRetallack教授来我校进行学术交流,欢迎广大师生积极参加!

报告题目:GLOBALCOOLINGBYGRASSLANDSINTHEGEOLOGICALPASTANDNEARFUTURE

报告人:GregRetallack教授

时间:2018年3月30日(星期五)14:30

地点:榆中校区天山堂B104

报告人简介:

GregRetallackisprofessorofEarthSciencesattheUniversityofOregoninEugene.HeobtainedaPhDattheUniversityofNewEnglandinAustralia,andenjoyedapostdocatIndianaUniversity.Heisbestknownforthestudyoffossilsoils(paleosols)ranginginagefromQuaternarybacktoArchean.

Hehaspublished8papersinScienceandNature,among263publishedpapersand10books.HeisafellowoftheGeologicalSocietyofAmericaandtheAmericanAssociationofScience.HisawardsincludetheStillwellMedaloftheGeologicalSocietyofAustraliaandtheIngersonMedaloftheGeochemicalSociety.

Histalkwilladdresshow,overthepast40millionyears,grasslandscoevolvedfromaseriesofmutualadaptationsingrassesandmammalstocreateuniquesoilsofgrasslandscalledMollisols,evidentfrompaleosolsby19millionyearsago.Thesesoilsandecosystemswiththeirhighorganiccontent,lowtranspirationandhighalbedowereaforceforglobalcooling.GrasslandcoevolutionthusprovidesabiologicalratherthantectonicoroceanicmechanismforplanetarycoolingculminatinginQuaternaryiceages.Modernagricultureisbasedongrasslandecosystems,andavarietyoffarmingtechniquesknownascarbonfarmingcanbeusedtooffsetcurrentglobalwarmingduetofossilfuelconsumption.

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