Sea surface temperature and continental surface air temperature in the Ordovician Period (440 million years ago, Ma) and the Late Cretaceous (80 Ma) simulated using models of Earth’s climate and carbon cycle.

This dataset includes two files:1) MEE2407448_Figure2_landDATA2) MEE2407448_Figure2_oceanDATA<b>File 1</b> contains the following data/information:<b>Variable descriptions:</b> Definitions and explanations of the variables included in the dataset.<b>Geographic Coordinates:</b> Latitude and longitude values for the data points.<b>Land Masks:</b> Historical land cover data indicating land and water distribution 440 million years ago (mya) and 80 mya.<b>Air Temperature:</b> Temperature data for 440 mya and 80 mya.<b>Terrestrial Net Primary Production (NPP):</b> A measure of plant growth and carbon fixation for 440 mya and 80 mya.<b>File 2</b> contains the following data/information:<b>Variable descriptions:</b> Definitions and explanations of the variables included in the dataset.<b>Geographic Coordinates:</b> Latitude and longitude values for the data points.<b>Land Masks:</b> Historical land cover data indicating land and water distribution 440 million years ago (mya) and 80 mya.<b>Seawater Temperature:</b> Surface seawater temperature data for 440 mya and 80 mya.<b>Ocean Export Production (EP):</b> The amount of primary production exported below the euphotic zone for 440 mya and 80 mya.

本数据集包含两个文件：1）MEE2407448_Figure2_landDATA；2）MEE2407448_Figure2_oceanDATA。
<b>文件1</b>包含以下数据与信息：
<b>变量说明</b>：数据集所包含变量的定义与解释。
<b>地理坐标</b>：数据点的纬度与经度数值。
<b>陆地掩码</b>：反映4.4亿年前（million years ago，缩写为mya）与8000万年前陆海分布的历史地表覆盖数据。
<b>气温</b>：4.4亿年前与8000万年前的气温数据。
<b>陆地净初级生产力（Terrestrial Net Primary Production, NPP）</b>：衡量4.4亿年前与8000万年前植物生长与碳固定情况的指标。
<b>文件2</b>包含以下数据与信息：
<b>变量说明</b>：数据集所包含变量的定义与解释。
<b>地理坐标</b>：数据点的纬度与经度数值。
<b>陆地掩码</b>：反映4.4亿年前与8000万年前陆海分布的历史地表覆盖数据。
<b>海水温度</b>：4.4亿年前与8000万年前的表层海水温度数据。
<b>海洋输出生产力（Ocean Export Production, EP）</b>：衡量4.4亿年前与8000万年前透光带以下输出的初级生产力总量的指标。