Class 4, Global temperature

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Class 4, Global temperature

  1. 1. GEOG5426 Taking the Earth’s temperature
  2. 2. 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.
  3. 3. Workload Along with the links, I will also send out a set of questions to focus your reading of the articles. As X 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.
  4. 4. 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.
  5. 5. James Hansen Goddard Insitute of Space Studies
  6. 6. Water Survey of Canada Weather Station Near Caroline, Alberta
  7. 7. Buckets used in ocean temperature measurements Kent et al. 2010
  8. 8. Global Tropical Moored Buoy Array h p://www.pmel.noaa.gov/tao/
  9. 9. Global Tropical Moored Buoy Array h p://www.pmel.noaa.gov/tao/
  10. 10. Global Historical Climate Network h p://www.ncdc.noaa.gov/oa/climate/ghcn-monthly/index.php
  11. 11. NASA global temperature record h p://www.giss.nasa.gov/
  12. 12. 2010 Jan-Aug temperature anomaly h p://www.giss.nasa.gov/
  13. 13. 2010 Jan-Aug temperature anomaly h p://www.giss.nasa.gov/
  14. 14. Temperature-sensitive trees Northeastern Alaska
  15. 15. Location of long temperature proxies Osborne and Briffa, 2006
  16. 16. (1) W USA (regional) PC of tree-ring chronologies (2) SW Canada (Icefields) RCS tree-ring chronology (3) W USA (Boreal/Upperwright) 2 RCS tree-ring chronologies (4) NE Canada (Quebec) RCS tree-ring chronology (5) E USA (Chesapeake Bay) Mg/Ca in fossil shells (6) W Greenland (regional) Composite of δ18O ice-core records (7) Netherlands/Belgium (regional) Documentary record (8) Austria (Tirol) RCS tree-ring chronology (9) N Sweden (Tornetrask) RCS tree-ring chronology (10) NW Russia (Yamal) RCS tree-ring chronology (11) NW Russia (Mangazeja) RCS tree-ring chronology (12) N Russia (Taimyr) RCS tree-ring chronology (13) Mongolia (regional) Composite of tree-ring chronologies (14) E Asia (regional) Composite of multiple proxy types Location of long temperature proxies Osborne and Briffa, 2006
  17. 17. Temperature-sensitive trees Alaska
  18. 18. Highly-variable NH temperatures? Moberg et al., 2005
  19. 19. “ 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
  20. 20. “High-resolution” proxies Moberg et al., 2005
  21. 21. “Low-resolution” proxies Moberg et al., 2005
  22. 22. Low (blue) and high (red) resolution proxies Moberg et al., 2005
  23. 23. Climate sensitivity In IPCC reports, climate sensitivity refers to the change in the mean global temperature following a doubling of the concentration of CO2 in the atmosphere.
  24. 24. 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).
  25. 25. 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).
  26. 26. No class October 6! (I’m going to Boulder)

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