Advanced

Lake-level records and palaeoclimates of northern Eurasia

Yu, Ge (1996) In LUNDQUA Thesis
Abstract
This thesis documented lake-level changes across Eurasia and made reconstructions of regional climates and atmospheric circulation patterns during the late Quaternary; analysed temporal signals in lake record; used lake data to improve pollen-based quantitative recostructions of climate; and compared lake data with simulated P-E fields from Atmospheric General Circulation (AGC) models. Lake records from northern Eurasia showed regionally-coherent patterns during the late Quaternary, in response to changes in insolation and glaciation (Papers I and II appended in the thesis). Time series analysis of European lake status through the Holocene (Paper III) has led to the identification of seven distinct patterns of lake behaviour, each... (More)
This thesis documented lake-level changes across Eurasia and made reconstructions of regional climates and atmospheric circulation patterns during the late Quaternary; analysed temporal signals in lake record; used lake data to improve pollen-based quantitative recostructions of climate; and compared lake data with simulated P-E fields from Atmospheric General Circulation (AGC) models. Lake records from northern Eurasia showed regionally-coherent patterns during the late Quaternary, in response to changes in insolation and glaciation (Papers I and II appended in the thesis). Time series analysis of European lake status through the Holocene (Paper III) has led to the identification of seven distinct patterns of lake behaviour, each characteristic of a specific geographical region. Three periods (9, 7 and 4ka B.P.) of rapid changes were corresponded to times when the atmospheric circulation regime underwent a rapid reorganization. Constrained-analogue reconstructions using pollen and lake data (Paper IV) esitmated quantitatively annual precipitation, runoff (P-E), mean temperature of the coldest month, mean temperature of the warmest month, and growing degree days above 5C at 6000 yr B.P., and showed strong regional and seasonal patterns across Europe. Predicted 6ka P-E fields from 5 AGC models have provided a mechanistic explanation for changes in lake status, e.g. insolation-induced enhancement of Asian monsoon (Paper V). The simulated mean annual conditions in Mediterranean region is consistent with lake data, but seasonality of changes is not consistent with pollen data. Some suggestion for improvement of the simulations was provided in the paper. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Thompson, Robert S., USA Geologic Survey
publishing date
type
Thesis
publication status
published
subject
keywords
late Quaternary, Holocene, palaeo-hydrology & -climatology, lake status, Eurasia, Geology, physical geography, Geologi, fysisk geografi
in
LUNDQUA Thesis
pages
17 pages
publisher
Department of Quaternary Geology, Lund University
defense location
Sölvegatan 10, Lund, Sweden
defense date
1996-06-06 10:15
external identifiers
  • other:ISRN: SE-LUNBDS/NBGK-96/37+17p
  • scopus:0030426651
ISSN
0281-3033
language
English
LU publication?
no
id
59afd161-ae57-4bba-91f5-a08b8b28c128 (old id 28542)
date added to LUP
2007-06-11 16:48:48
date last changed
2017-01-01 07:02:17
@phdthesis{59afd161-ae57-4bba-91f5-a08b8b28c128,
  abstract     = {This thesis documented lake-level changes across Eurasia and made reconstructions of regional climates and atmospheric circulation patterns during the late Quaternary; analysed temporal signals in lake record; used lake data to improve pollen-based quantitative recostructions of climate; and compared lake data with simulated P-E fields from Atmospheric General Circulation (AGC) models. Lake records from northern Eurasia showed regionally-coherent patterns during the late Quaternary, in response to changes in insolation and glaciation (Papers I and II appended in the thesis). Time series analysis of European lake status through the Holocene (Paper III) has led to the identification of seven distinct patterns of lake behaviour, each characteristic of a specific geographical region. Three periods (9, 7 and 4ka B.P.) of rapid changes were corresponded to times when the atmospheric circulation regime underwent a rapid reorganization. Constrained-analogue reconstructions using pollen and lake data (Paper IV) esitmated quantitatively annual precipitation, runoff (P-E), mean temperature of the coldest month, mean temperature of the warmest month, and growing degree days above 5C at 6000 yr B.P., and showed strong regional and seasonal patterns across Europe. Predicted 6ka P-E fields from 5 AGC models have provided a mechanistic explanation for changes in lake status, e.g. insolation-induced enhancement of Asian monsoon (Paper V). The simulated mean annual conditions in Mediterranean region is consistent with lake data, but seasonality of changes is not consistent with pollen data. Some suggestion for improvement of the simulations was provided in the paper.},
  author       = {Yu, Ge},
  issn         = {0281-3033},
  keyword      = {late Quaternary,Holocene,palaeo-hydrology & -climatology,lake status,Eurasia,Geology,physical geography,Geologi,fysisk geografi},
  language     = {eng},
  pages        = {17},
  publisher    = {Department of Quaternary Geology, Lund University},
  series       = {LUNDQUA Thesis},
  title        = {Lake-level records and palaeoclimates of northern Eurasia},
  year         = {1996},
}