Dataset
Dataset: Deuterium excess record during different time periods in Lomonosovfonna ice core
Divine, D. V. (Creator), Isaksson, E. (Creator), Veijo, A. (Creator), Meijer, H. (Creator), Van De Wal, R. S. W. (Creator), Martma, T. (Creator), Moore, J. (Creator), Sjögren, B. (Creator), Godtliebsen, F. (Creator), PANGAEA, Data Publisher for Earth & Environmental Science, 2008
DOI: https://doi.org/10.1594/PANGAEA.809116
Dataset
- D.V. Divine (Creator)
- Elisabeth Isaksson (Creator)
- A. Veijo (Creator)
- Harro Meijer (Creator)
- Roderik S. W. Van De Wal (Creator)
- Tonu Martma (Creator)
- J Moore (Creator)
- B. Sjögren (Creator)
- Fred Godtliebsen (Creator)
- Norsk Polarinstitutt, Tromso
- Tallinn Univ, Tallinn University
Description
In the paper we present a deuterium excess (d) record from an ice core drilled on a small ice cap in Svalbard in 1997. The core site is located at Lomonosovfonna at 1255 m asl, and the analyzed time series spans the period 1400-1990 A.D. The record shows pronounced multidecadal to centennial-scale variations coherent with sea surface temperature changes registered in the subtropical to southern middle-latitude North Atlantic during the instrumental period. We interpret the negative trend in the deuterium excess during the 1400s and 1500s as an indication of cooling in the North Atlantic associated with the onset of the Little Ice Age. Consistently positive anomalies of d after 1900, peaking at about 1950, correspond with well-documented contemporary warming. Yet the maximum values of deuterium excess during 1900-1990 are not as high as in the early part of the record (pre-1550). This suggests that the sea surface temperatures during this earlier period of time in the North Atlantic to the south of approximately 45°N were at least comparable with those registered in the 20th century before the end of the 1980s. We examine the potential for a cold bias to exist in the deuterium excess record due to increased evaporation from the local colder sources of moisture having isotopically cold signature. It is argued that despite a recent oceanic warming, the contribution from this local moisture to the Lomonosovfonna precipitation budget is still insufficient to interfere with the isotopic signal from the primary moisture region in the midlatitude North Atlantic.
Date made available | 2008 |
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Publisher | PANGAEA, Data Publisher for Earth & Environmental Science |
Temporal coverage | 1400 - 1990 |
Date of data production | 1-Jan-1997 |
Geographical coverage | Lomonosovfonna |
Access to the dataset | Open |
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Contact | researchdata@rug.nl |
- deuterium excess, climate, Ice drill
Keywords on Datasets
Related Publications
Deuterium excess record from a small Arctic ice cap
Divine, D. V., Isaksson, E., Pohjola, V., Meijer, H., van de Wal, R. S. W., Martma, T., Moore, J., Sjögren, B. & Godtliebsen, F., 3-Oct-2008, In : Journal of geophysical research-Atmospheres. 113, D19, 12 p., 19104.Research output: Contribution to journal › Article › Academic › peer-review
ID: 71242606