Model estimates of water yield and N yield under alternative N management practices across the Mississippi-Atchafalaya River basin during 1980-2017

This dataset contains maps of water yield and nitrogen (N) yield each year, covering the Mississippi/Atchafalaya River Basin (MARB) spanning from 1980 to 2017. These maps were reconstructed by aggregating from a daily model (Dynamic Land Ecosystem Model, DLEM) estimates and are at 5-min×5-min (0.08333° Lat × 0.08333° Lon) resolution. There are two subfolders, "TT" and "DT", within this folder. "TT" and "DT" respectively indicate "traditional timing" and "dynamic timing" of nitrogen fertilizer applications in regards to the model experiments in the main text. The "TT" folder contains the gridded model estimates of water yield (named by "Runoff") and nitrogen yield (named by "Nleach") at annual bases. TT reflects our best estimate of water and N fluxes within the context of multi-factor environmental changes including climate, atmospheric CO2 concentration, N deposition, land use, and human management practices (such as fertilizer use, tillage, tile drainage, etc.). The "DT" folder only contains the model estimates of nitrogen yield (“Nleach”) under an alternative N management practice. More details can be found in the linked publication.本数据集涵盖1980年至2017年密西西比-阿查法拉亚河流域（Mississippi/Atchafalaya River Basin, MARB）的逐年水产量与氮（N）产格网地图。此类地图通过聚合逐日模型（动态陆地生态系统模型，Dynamic Land Ecosystem Model, DLEM）的估算结果重构得到，空间分辨率为5分×5分（0.08333°纬度 × 0.08333°经度）。本数据集目录下设有"TT"与"DT"两个子文件夹，二者分别对应正文中模型试验所采用的氮肥施用"传统时段（traditional timing, TT）"与"动态时段（dynamic timing, DT）"方案。"TT"文件夹内包含逐年格网化的水产量（命名为"Runoff"）与氮产（命名为"Nleach"）的模型估算结果。该方案反映了在气候、大气CO₂浓度、氮沉降、土地利用及人类管理措施（如化肥施用、耕作方式、暗管排水等）多因素环境变化背景下，我们对水与氮通量的最优估算结果。"DT"文件夹仅包含采用替代性氮管理方案下的氮产（"Nleach"）模型估算结果。更多细节可参阅关联的学术出版物。