Air temperature and water level inferences from northeastern Lapland (69°N) since the Little Ice Age
Oglądaj/ Otwórz
Data
2020Autor
Luoto, Tomi P.
Kivilä, E. Henriikka
Nevalainen, Liisa
Kotrys, Bartosz
Płóciennik, Mateusz
Rantala, Marttiina V.
Metadata
Pokaż pełny rekordStreszczenie
Independent Arctic records of temperature and precipitation from the same proxy archives
are rare. Nevertheless, they are important for providing detailed information on long-term climate
changes and temperature-precipitation relationships in the context of large-scale atmospheric
dynamics. Here, we used chironomid and cladoceran fossil assemblages to reconstruct summer airtemperature and water-level changes, during the past 400 years, in a small lake located in Finnish
Lapland. Temperatures remained persistently cold over the Little Ice Age (LIA), but increased in the
20th century. After a cooler phase in the 1970s, the climate rapidly warmed to the record-high
temperatures of the most recent decades. The lake-level reconstruction suggested persistently wet
conditions for the LIA, followed by a dry period between ~1910 and 1970 CE, when the lake
apparently became almost dry. Since the 1980s, the lake level has returned to a similar position as
during the LIA. The temperature development was consistent with earlier records, but a significant
local feature was found in the lake-level reconstruction – the LIA appears to have been continuously
wet, without the generally depicted dry phase during the 18th and 19th centuries. Therefore, the results
suggest local precipitation patterns and enforce the concept of spatially divergent LIA conditions.
Collections
Z tą pozycją powiązane są następujące pliki licencyjne: