青藏高原东北部树轮宽度和重建的降水量、土壤水分条件数据序列以及德令哈地区树轮的定年数据（1580B.C.-2006A.D.）

青藏高原东北部德令哈、天峻和乌兰的树轮宽度和重建的降水量、土壤水分条件数据序列以及德令哈地区过去3500年树轮的定年数据。本数据集由实验室测量获取，由仪器或者实验完成后直接得到数据。在各个环节严格按照相关操作规程进行样品和数据采集。
本数据集共有3个子表：
子表1为德令哈天峻乌兰轮宽，共有4个字段，其中每三个字段代表一个站点的数据，分别为站点编号，公元年份，样本量和宽度指数；
子表2为降水量和土壤水分重建，有5个字段，分别为公元、降水量、土壤相对湿度、植物生长需水量和实际蒸发量；其代表的实际含义分别为：
ppt: 德令哈上一年7月至当年6月降水量；
rsm_56：德令哈56月土壤相对湿度；
accdef：上一年7月至当年6月植物生长需水量；
ae16：1月－6月实际蒸发量；
子表3为3500年轮宽指数，共有3个字段，分别为年份、轮宽指数和样本量；其中年份中负号代表公元前；
各子表中轮宽指数无量纲，蒸发量、降水量、植物生长需水量单位均为mm，样本量单位为个。

Tree-ring width data, reconstructed precipitation and soil moisture condition data sequences from Delingha, Tianjun and Ulan in the northeastern Qinghai-Tibet Plateau, as well as tree-ring dating data spanning the past 3500 years in the Delingha area. This dataset was generated through laboratory measurements, with raw data directly acquired upon completion of instrument tests or experiments. Sample and data collection were conducted in strict compliance with relevant operating procedures across all stages.

This dataset contains three sub-tables:

Sub-table 1 contains tree-ring width data from Delingha, Tianjun and Ulan, with a total of 4 fields. Every three fields correspond to the dataset of one station, which are station number, AD year, sample size and width index respectively;

Sub-table 2 contains reconstructed precipitation and soil moisture data, with 5 fields: Year (AD), precipitation, soil relative humidity, plant water demand for growth and actual evaporation. Their specific definitions are as follows:
"ppt": Precipitation from July of the previous year to June of the current year in Delingha;
"rsm_56": Soil relative humidity during May to June in Delingha;
"accdef": Plant water demand for growth from July of the previous year to June of the current year;
"ae16": Actual evaporation from January to June;

Sub-table 3 contains 3500-year tree-ring width index data, with 3 fields: year, tree-ring width index and sample size. The minus sign in the year field indicates years Before Christ (BC);

In all sub-tables, the tree-ring width index is dimensionless. The units of evaporation, precipitation and plant water demand for growth are all millimeters (mm), and the unit of sample size is individual.

搜集汇总

背景与挑战

背景概述

该数据集提供了青藏高原东北部德令哈、天峻和乌兰地区的树轮宽度数据及重建的降水量和土壤水分条件序列，时间跨度长达3586年（1580B.C.-2006A.D.），包含三个子表分别记录不同站点的轮宽指数、气候重建数据和长期轮宽序列，为研究该地区古气候和环境变化提供了重要基础数据。