Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjijaure) in northern Sweden. Rosén, P., Segerström, U., Eriksson, L., Renberg, I., & Birks, H. J. The Holocene, 11(5):551–562, July, 2001.
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjijaure) in northern Sweden [link]Paper  doi  abstract   bibtex   
The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spec troscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67°22N, 18°04E), situated 100 m above tree-line in the Scandes mountains. Mean July air temperature was reconstructed using transfer functions established for the region. The biological proxies show significant changes in composition during the Holocene and the inferred temperatures all follow the same general trend. For the period between about 9300 to 7300 cal. BP the reconstructions should be interpreted with caution due to the lack of convincing modern analogues in the training set. However the reconstruction suggest that July temperature was on average about the same as today, with several rapid short-term cold and warm periods. Cold periods were dated to about 8500, 8200 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP, a major shift to a warmer climate occurred. Pine migrated into the area, which was previously covered with birch forest. From the mid-Holocene until today the sediment record suggests a descending tree-limit and a gradual lowering of July temperature.
@article{rosen_holocene_2001,
	title = {Holocene climatic change reconstructed from diatoms, chironomids, pollen and                 near-infrared spectroscopy at an alpine lake ({Sjuodjijaure}) in northern {Sweden}},
	volume = {11},
	issn = {0959-6836},
	url = {http://journals.sagepub.com/doi/abs/10.1191/095968301680223503},
	doi = {10.1191/095968301680223503},
	abstract = {The results of a multiproxy study reconstructing the climate history of the last 9300                 years in northern Sweden are presented. It is based on diatom, chironomid and pollen                 analyses, as well as near-infrared spec troscopy (NIRS), of a radiocarbon dated                 sediment core from Sjuodjijaure (67°22N, 18°04E), situated 100 m                 above tree-line in the Scandes mountains. Mean July air temperature was                 reconstructed using transfer functions established for the region. The biological                 proxies show significant changes in composition during the Holocene and the inferred                 temperatures all follow the same general trend. For the period between about 9300 to                 7300 cal. BP the reconstructions should be interpreted with caution due to the lack                 of convincing modern analogues in the training set. However the reconstruction                 suggest that July temperature was on average about the same as today, with several                 rapid short-term cold and warm periods. Cold periods were dated to about 8500, 8200                 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP,                 a major shift to a warmer climate occurred. Pine migrated into the area, which was                 previously covered with birch forest. From the mid-Holocene until today the sediment                 record suggests a descending tree-limit and a gradual lowering of July temperature.},
	language = {en},
	number = {5},
	urldate = {2017-02-07},
	journal = {The Holocene},
	author = {Rosén, Peter and Segerström, Ulf and Eriksson, Lars and Renberg, Ingemar and Birks, H. J.B.},
	month = jul,
	year = {2001},
	keywords = {\#nosource, Holocene climate, Lake sediments, Northern Sweden, Pollen, chironomid, diatom, near-infrared spectroscopy, northern sweden},
	pages = {551--562},
}

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