NOAA/WDS Paleoclimatology - NEEM Ice Core 120,000 Year Bromine and Sodium 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 ice cores with a geographic location of Greenland. The time period coverage is from 120295 to -24 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: Spolaor, A.; Vallelonga, P.; Turetta, C.; Maffezzoli, N.; Cozzi, G.; Gabrieli, J.; Barbante, C.; Goto-Azuma, K.; Saiz-Lopez, A.; Cuevas, C.A.; Dahl-Jensen, D. (2016-09-23): NOAA/WDS Paleoclimatology - NEEM Ice Core 120,000 Year Bromine and Sodium Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/dzxm-fs18. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/dzxm-fs18
- noaa-icecore-20528
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-icecore-20528
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
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: 120295 cal yr BP to -24 cal yr BP; |
Time Period | -118345 to 1974 |
Spatial Bounding Box Coordinates |
N: 77.45
S: 77.45
E: -51.066667
W: -51.066667
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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: Bromine, sodium and bromine enrichment data used to reconstruct Canadian Arctic sea ice over the past 120 ky
ABSTRACT SUPPLIED BY ORIGINATOR: Reconstructing the past variability of Arctic sea ice provides an essential context for recent multi-year sea ice decline, although few quantitative reconstructions cover the Holocene period prior to the earliest historical records 1,200 years ago. Photochemical recycling of bromine is observed over first-year, or seasonal, sea ice in so-called "bromine explosions" and we employ a 1-D chemistry transport model to quantify processes of bromine enrichment over first-year sea ice and depositional transport over multi-year sea ice and land ice. We report bromine enrichment in the Northwest Greenland Eemian NEEM ice core since the end of the Eemian interglacial 120,000 years ago, finding the maximum extension of first-year sea ice occurred approximately 9,000 years ago during the Holocene climate optimum, when Greenland temperatures were 2 to 3C above present values. First-year sea ice extent was lowest during the glacial stadials suggesting complete coverage of the Arctic Ocean by multi-year sea ice. These findings demonstrate a clear relationship between temperature and first-year sea ice extent in the Arctic and suggest multi-year sea ice will continue to decline as polar amplification drives Arctic temperatures beyond the 2C global average warming target of the recent COP21 Paris climate agreement. |
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: 2023-11-20
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