Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.536
IF3.536
IF 5-year value: 3.967
IF 5-year
3.967
CiteScore value: 6.6
CiteScore
6.6
SNIP value: 1.262
SNIP1.262
IPP value: 3.90
IPP3.90
SJR value: 2.185
SJR2.185
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
index
71
h5-index value: 40
h5-index40
Preprints
https://doi.org/10.5194/cp-2020-61
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2020-61
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  05 May 2020

05 May 2020

Review status
This discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The manuscript was not accepted for further review after discussion.

Holocene glaciation in the Rwenzori Mountains, Uganda

Margaret S. Jackson1,a, Meredith A. Kelly1, James M. Russell2, Alice M. Doughty3, Jennifer A. Howley1,b, Susan R. H. Zimmerman4, and Bob Nakileza5 Margaret S. Jackson et al.
  • 1Earth Sciences, Dartmouth College, Hanover, NH, USA
  • 2Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, USA
  • 3Geology, Bates College, Lewiston, ME, USA
  • 4Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA, USA
  • 5Mountain Resource Centre, Makerere University, Kampala, Uganda
  • acurrent address: School of Geography, Archaeology, and Irish Studies, National University of Ireland Galway, Galway, UK
  • bcurrent address: New Hampshire Department of Health and Human Services, Concord, NH, USA

Abstract. Tropical glaciers are retreating rapidly, threatening alpine ecosystems across the low latitudes. Understanding how tropical glaciers responded to past periods of warming is crucial for predicting and adapting to future climate change, yet relatively little is known about glacial fluctuations in tropical regions during the recent past (i.e., the Holocene Epoch). This is particularly true in the African tropics, where data constraining the timing and magnitude of Holocene glacial fluctuations in the region are sparse and where temperatures during the middle Holocene were perhaps as warm as or warmer than today. Here we present new beryllium-10 surface-exposure ages that constrain Holocene glacial extents in the equatorial Rwenzori Mountains, Uganda. These results document rapid Early Holocene (~11.7–8.2 ka) glacial retreat in two separate catchments and indicate that Late Holocene (~4.2 ka-present) deposits mark the greatest expansion of Rwenzori glaciers during the last ~11 ka. Holocene glacial fluctuations elsewhere in tropical Africa and in tropical South America are broadly similar to those in the Rwenzori, with most tropical glaciers retreating rapidly during the Early Holocene and remaining near or inboard of their Late Holocene positions through much of Holocene time. The similarity of Holocene glacial fluctuations across the tropics implies that low-latitude glaciers responded to a common forcing mechanism, most likely temperature. Although the drivers of Holocene temperature changes in the tropics remains enigmatic, these data help constrain the expression of tropical temperature changes in the low latitudes.

Margaret S. Jackson et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Margaret S. Jackson et al.

Margaret S. Jackson et al.

Viewed

Total article views: 535 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
387 114 34 535 24 35
  • HTML: 387
  • PDF: 114
  • XML: 34
  • Total: 535
  • BibTeX: 24
  • EndNote: 35
Views and downloads (calculated since 05 May 2020)
Cumulative views and downloads (calculated since 05 May 2020)

Viewed (geographical distribution)

Total article views: 439 (including HTML, PDF, and XML) Thereof 439 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 17 Sep 2020
Publications Copernicus
Download
Citation