DOI: 10.1016/j.quascirev.2018.05.038
Scopus记录号: 2-s2.0-85048761864
论文题名: Decoupled early Holocene summer temperature and monsoon precipitation in southwest China
作者: Wu D. ; Chen X. ; Lv F. ; Brenner M. ; Curtis J. ; Zhou A. ; Chen J. ; Abbott M. ; Yu J. ; Chen F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 193 起始页码: 54
结束页码: 67
语种: 英语
英文关键词: Decoupled variation
; Early Holocene
; Indian summer monsoon
; Mean July temperature
; Xingyun Lake
Scopus关键词: Atmospheric aerosols
; Atmospheric thermodynamics
; Climate change
; Incident solar radiation
; Lakes
; Precipitation (meteorology)
; Decoupled variation
; Early Holocene
; High-latitude regions
; Higher latitudes
; Indian summer monsoon
; Monsoon precipitation
; Seasonal temperature variations
; Summer temperature
; Atmospheric temperature
; climate variation
; Holocene
; Hypsithermal
; monsoon
; oxygen isotope
; paleotemperature
; precipitation (climatology)
; proxy climate record
; reconstruction
; sediment core
; summer
; Younger Dryas
; China
; Xingyun Lake
; Yunnan
英文摘要: Proxy-based reconstructions of Holocene temperature show that both the timing and magnitude of the thermal maximum varied substantially across different regions. Given the ‘Holocene temperature conundrum’, it is becoming increasingly important to reconstruct seasonal temperature variations. As a major component of the global monsoon system, the Indian summer monsoon (ISM) transports moisture and heat from the tropical oceans to higher latitudes and thus it has substantial socioeconomic implications for its regions of influences. We developed a well-dated, pollen-based summer temperature record (mean July; MJT) for the last 14,000 years from Xingyun Lake in southwest China, where the climate is dominated by the ISM. MJT decreased during the Younger Dryas, increased slowly to high values during 8000–5500 yr BP, and decreased thereafter. The MJT record differs from that inferred using carbonate oxygen isotopes (δ18O) from the same sediment core. The latter record reflects variations in monsoon precipitation, with highest precipitation during the early Holocene (11,000–6500 yr BP). We propose that summer temperature and precipitation in southwest China were decoupled during the early Holocene. Both MJT and monsoon precipitation decreased after the middle Holocene, tracking the trend in boreal summer insolation. We suggest that greater cloud cover, associated with high precipitation and generated by a strong summer monsoon, may have depressed early Holocene temperatures that would otherwise be driven by greater summer insolation. Melting ice sheets in high-latitude regions and high concentrations of atmospheric aerosols during the early Holocene may also have contributed, in part, to the relatively cool summer temperatures. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112113
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: College of Earth and Environmental Sciences, MOE Key Laboratory of Western China's Environmental System, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Frozen Soils Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, China; Department of Geological Sciences and Land Use and Environmental Change Institute, University of Florida, Gainesville, 32611, United States; Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, 15260, United States; Qinghai Institute of Salt Lake Studies, Chinese Academy of Sciences, Xining, 810008, China; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China
Recommended Citation:
Wu D.,Chen X.,Lv F.,et al. Decoupled early Holocene summer temperature and monsoon precipitation in southwest China[J]. Quaternary Science Reviews,2018-01-01,193