DOI: 10.1016/j.quascirev.2018.12.016
Scopus记录号: 2-s2.0-85058978950
论文题名: Quantitative reconstruction of primary productivity in low latitudes during the last glacial maximum and the mid-to-late Holocene from a global Florisphaera profunda calibration dataset
作者: Hernández-Almeida I. ; Ausín B. ; Saavedra-Pellitero M. ; Baumann K.-H. ; Stoll H.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 205 起始页码: 166
结束页码: 181
语种: 英语
英文关键词: Biogeography
; Carbon cycle
; Coccolithophores
; Global calibration
; Holocene
; Last Glacial Maximum
; Ocean net primary productivity
; Paleoceanography
; Paleoecology
; Quantitative reconstruction
Scopus关键词: Ecosystems
; Glacial geology
; Photosynthesis
; Phytoplankton
; Satellites
; Statistical tests
; Surficial sediments
; Biogeography
; Carbon cycles
; Coccolithophores
; Global calibration
; Holocenes
; Last Glacial Maximum
; Net primary productivity
; Paleoceanography
; Paleoecology
; Surface testing
; biogeography
; calibration
; carbon cycle
; coccolith
; data set
; fossil record
; global perspective
; Holocene
; Last Glacial Maximum
; net primary production
; paleoceanography
; reconstruction
; relative abundance
; satellite data
; sediment trap
; spatial distribution
; Haptophyceae
英文摘要: Ocean net primary productivity (Npp) is a key component of the marine carbon cycle. Multi-model Npp projections based on a few decades of satellite data show large uncertainties, in particular at low latitudes (30°N−30°S). Calibration of sedimentary proxies with satellite-based Npp estimates allows for the quantitative reconstruction of this variable at longer time-scales. Relative abundance of deep-photic zone coccolithophore species Florisphaera profunda in the fossil record can potentially be used as a quantitative proxy for Npp. However, the robustness of this proxy calibration has been tested in very specific oceanographic settings using surface sediment samples. Here, we use a global dataset of surface sediment (n = 1258) and sediment trap (n = 26) samples with relative abundance data of F. profunda (%) to test the robustness of this proxy as a quantitative indicator of Npp. We study the modern and paleo-ecology of this species and the main factors affecting its latitudinal distribution. Results show that F. profunda % is a strong indicator of Npp at latitudes between 30°N and 30°S, while at higher latitudes temperature-related variables are more important. We develop a global calibration model between satellite Npp estimates and F. profunda for the latitudinal range between 30°N and 30°S, and we apply it to several low-latitude sediment cores with available F. profunda counts covering the Late Glacial Maximum (LGM; 24–19 ka) and the Mid-to-Late Holocene period (MLH; <6 ka). Reconstructed Npp during the LGM is 15% higher than during the MLHdue to the intensification of trade winds that enhanced oceanic upwelling at low latitudes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117397
Appears in Collections: 气候变化与战略
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Recommended Citation:
Hernández-Almeida I.,Ausín B.,Saavedra-Pellitero M.,et al. Quantitative reconstruction of primary productivity in low latitudes during the last glacial maximum and the mid-to-late Holocene from a global Florisphaera profunda calibration dataset[J]. Quaternary Science Reviews,2019-01-01,205