Class 4, Global temperature

GEOG5426 Taking the Earth’s temperature

Workload Along with the links, I will also send out a set of questions to focus your reading of the articles. As part of your pre-work, you will be asked to submit a short response to these questions (no more than a page of double-spaced text) at the beginning of class.

Workload Along with the links, I will also send out a set of questions to focus your reading of the articles. As part of your pre-work, you will be asked to submit a short response to these questions (no more than a page of double-spaced text) at the beginning of class.

X

Workload At the end of class, one student will be assigned to write a short summary of the articles and conclusions drawn during our discussion.  I’ll review the summary and post it to the class blog so that everyone can benefit from the effort.

James Hansen Goddard Insitute of Space Studies

Water Survey of Canada Weather Station Near Caroline, Alberta

Buckets used in ocean temperature measurements Kent et al. 2010

Global Tropical Moored Buoy Array h#p://www.pmel.noaa.gov/tao/

Global Tropical Moored Buoy Array h#p://www.pmel.noaa.gov/tao/

Global Historical Climate Network h!p://www.ncdc.noaa.gov/oa/climate/ghcn-monthly/index.php

NASA global temperature record h#p://www.giss.nasa.gov/

2010 Jan-Aug temperature anomaly h#p://www.giss.nasa.gov/

2010 Jan-Aug temperature anomaly h#p://www.giss.nasa.gov/

Temperature-sensitive trees Northeastern Alaska

Location of long temperature proxies Osborne and Briffa, 2006

Location of long temperature proxies Osborne and Briffa, 2006

(1) W USA (regional)(2) SW Canada (Icefields)(3) W USA (Boreal/Upperwright)(4) NE Canada (Quebec)(5) E USA (Chesapeake Bay)(6) W Greenland (regional)(7) Netherlands/Belgium (regional)(8) Austria (Tirol)(9) N Sweden (Tornetrask)(10) NW Russia (Yamal)(11) NW Russia (Mangazeja)(12) N Russia (Taimyr)(13) Mongolia (regional)(14) E Asia (regional)

PC of tree-ring chronologiesRCS tree-ring chronology2 RCS tree-ring chronologiesRCS tree-ring chronologyMg/Ca in fossil shellsComposite of δ18O ice-core recordsDocumentary recordRCS tree-ring chronologyRCS tree-ring chronologyRCS tree-ring chronologyRCS tree-ring chronologyRCS tree-ring chronologyComposite of tree-ring chronologiesComposite of multiple proxy types

Temperature-sensitive trees Alaska

Highly-variable NH temperatures? Moberg et al., 2005

Indeed, the challenge for palaeoclimate researchers — and their funding agencies — is to produce multi-proxy reconstructions at the appropriate regional scale so that all of the voices can be heard.”David Anderson and Connie Woodhouse

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“High-resolution” proxies Moberg et al., 2005

“Low-resolution” proxies Moberg et al., 2005

Low (blue) and high (red) resolution proxies Moberg et al., 2005

Climate sensitivityIn IPCC reports, climate sensitivity refers to the change in the mean global temperature following a doubling of the concentration of CO2 in the atmosphere.

Workload A paper, not to exceed 10 pages of text plus figures and references, which reviews the climate history of a single region over a specific time period during the Holocene (e.g., the mid-Holocene, the last 2ka or the last 500 yr).

Workload A paper, not to exceed 10 pages of text plus figures and references, which reviews the climate history of a single region over a specific time period during the Holocene (e.g., the mid-Holocene, the last 2ka or the last 500 yr).

No class October 6!

(I’m going to Boulder)