Gridded pollen-based Holocene regional plant cover in temperate and northern subtropical China suitable for climate modelling

[摘要] We present the first gridded and temporally continuous quantitativepollen-based plant-cover reconstruction for temperate and northernsubtropical China over the Holocene (11.7 ka to present) obtained by applying theRegional Estimates of VEgetation Abundance from Large Sites (REVEALS) model.The objective is to provide a dataset of pollen-based land cover for thelast ca. 12 millennia that is suitable for palaeoclimate modelling and for the evaluationof simulated past vegetation cover from dynamic vegetation models andanthropogenic land-cover change (ALCC) scenarios. The REVEALS reconstructionwas achieved using 94 selected pollen records from lakes and bogs at a1 ∘   ×  1 ∘ spatial scale and a temporal resolutionof 500 years between 11.7 and 0.7 ka and in three recent time windows(0.7–0.35 ka, 0.35–0.1 ka, and 0.1 ka to present). The datasetincludes REVEALS estimates of cover and their standard errors (SEs) for 27plant taxa in 75 1 ∘   ×  1 ∘ grid cells distributedwithin the study region. The 27 plant taxa were also grouped into 6 plantfunctional types and 3 land-cover types (coniferous trees CT,broadleaved trees BT, and C 3 herbs/open land (C 3 H/OL)), and their REVEALSestimates of cover and related SEs were calculated. We describe the protocolused for the selection of pollen records and the REVEALS application (withparameter settings) and explain the major rationales behind the protocol. Asan illustration, we present, for eight selected time windows, gridded maps ofthe pollen-based REVEALS estimates of cover for the three land-cover types(CT, BT, and C 3 H/OL). We then discuss the reliability and limitations of theChinese dataset of Holocene gridded REVEALS plant cover, and its current andpotential uses. The dataset is available at the National Tibetan Plateau Data Center (TPDC;Li, 2022; https://doi.org/10.11888/Paleoenv.tpdc.272292 ).

[学科分类] 眼科学