NOAA/WDS Paleoclimatology - EPICA DOME C Penultimate Deglaciation CH4 and N2O Data
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Ice Core. The data include parameters of climate forcing|ice cores with a geographic location of Antarctica. The time period coverage is from 144989 to 125674 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Schmidely, L.; Nehrbass-Ahles, C.; Schmitt, J.; Han, J.; Silva, L.C.R.; Shin, J.; Joos, F.; Chappellaz, J.A.; Fischer, H.; Stocker, T.F. (2021-07-28): NOAA/WDS Paleoclimatology - EPICA DOME C Penultimate Deglaciation CH4 and N2O Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/xhws-z175. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/xhws-z175
- noaa-icecore-33673
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-icecore-33673
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Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 144989 cal yr BP to 125674 cal yr BP; |
Time Period | -143039 to -123724 |
Spatial Bounding Box Coordinates |
N: -75.1
S: -75.1
E: 123.4
W: 123.4
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Spatial Coverage Map |
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: CH4 and N2O data from the EPICA DOME C ice core during the penultimate deglaciation (145-125 ka).
ABSTRACT SUPPLIED BY ORIGINATOR: Deglaciations are characterized by the largest natural changes in methane (CH4) and nitrous oxide (N2O) concentrations of the past 800 000 years. Reconstructions of millennial- to centennial-scale variability within these periods are mostly restricted to the last deglaciation. In this study, we present composite records of CH4 and N2O concentrations from the EPICA Dome C ice core covering the penultimate deglaciation at temporal resolutions of ~100 years. Our data permit the identification of centennial-scale fluctuations during the transition from glacial to interglacial levels. At ~134 000 and ~129 000 years before present (hereafter ka), both CH4 and N2O increased on centennial timescales. These abrupt rises are similar to the fluctuations associated with the Dansgaard-Oeschger events identified in the last glacial period. In addition, gradually rising N2O levels at ~130 ka resemble a pattern of increasing N2O concentrations on millennial timescales characterizing the later part of Heinrich stadials. Overall, the events in CH4 and N2O during the penultimate deglaciation exhibit modes of variability that are also found during the last deglaciation and glacial cycle, suggesting that the processes leading to changes in emission during the transitions were similar but their timing differed. |
Purpose | Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2023-09-01
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