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| Titel |
Holocene land-cover reconstructions for studies on land cover-climate feedbacks |
| VerfasserIn |
M.-J. Gaillard, S. Sugita, F. Mazier, A.-K. Trondman, A. Broström, T. Hickler, J. O. Kaplan, E. Kjellström, U. Kokfelt, P. Kuneš, C. Lemmen, P. Miller, J. Olofsson, A. Poska, M. Rundgren, B. Smith, G. Strandberg, R. Fyfe, A. B. Nielsen, T. Alenius, L. Balakauskas, L. Barnekow, H. J. B. Birks, A. Bjune, L. Björkman, T. Giesecke, K. Hjelle, L. Kalnina, M. Kangur, W. O. Knaap, T. Koff, P. Lagerås, M. Latałowa, M. Leydet, J. Lechterbeck, M. Lindbladh, B. Odgaard, S. Peglar, U. Segerström, H. Stedingk, H. Seppä |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 6, no. 4 ; Nr. 6, no. 4 (2010-07-26), S.483-499 |
| Datensatznummer |
250003656
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| Publikation (Nr.) |
 copernicus.org/cp-6-483-2010.pdf |
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| Zusammenfassung |
| The major objectives of this paper are: (1) to review the pros and cons of
the scenarios of past anthropogenic land cover change (ALCC) developed
during the last ten years, (2) to discuss issues related to pollen-based
reconstruction of the past land-cover and introduce a new method, REVEALS
(Regional Estimates of VEgetation Abundance from Large Sites), to infer
long-term records of past land-cover from pollen data, (3) to present a new
project (LANDCLIM: LAND cover – CLIMate interactions in NW Europe
during the Holocene) currently underway, and show preliminary results of
REVEALS reconstructions of the regional land-cover in the Czech Republic for
five selected time windows of the Holocene, and (4) to discuss the
implications and future directions in climate and vegetation/land-cover
modeling, and in the assessment of the effects of human-induced changes in
land-cover on the regional climate through altered feedbacks. The existing
ALCC scenarios show large discrepancies between them, and few cover time
periods older than AD 800. When these scenarios are used to assess the
impact of human land-use on climate, contrasting results are obtained. It
emphasizes the need for methods such as the REVEALS model-based land-cover
reconstructions. They might help to fine-tune descriptions of past
land-cover and lead to a better understanding of how long-term changes in
ALCC might have influenced climate. The REVEALS model is demonstrated to
provide better estimates of the regional vegetation/land-cover changes than
the traditional use of pollen percentages. This will achieve a robust
assessment of land cover at regional- to continental-spatial scale
throughout the Holocene. We present maps of REVEALS estimates for the
percentage cover of 10 plant functional types (PFTs) at 200 BP and 6000 BP,
and of the two open-land PFTs "grassland" and "agricultural land" at
five time-windows from 6000 BP to recent time. The LANDCLIM results are
expected to provide crucial data to reassess ALCC estimates for a better
understanding of the land suface-atmosphere interactions. |
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