Data for Spaulding-Astudillo and Mitchell (2024a), "A simple model for the emergence of relaxation-oscillator convection"

Data for Spaulding-Astudillo and Mitchell (2024a), "A simple model for the emergence of relaxation-oscillator convection"

The main directories have a common nomenclature: e.g., minimal_1p1S_FSC_335K_N7200, where 1p1S indicates a solar constant 1.1 times the present day (1360), FSC indicates that it is a full-sky radiation run, 335 K is the surface temperature (fixed), and N7200 refers to the relaxation timescale of 7200 seconds for CAPE in the quasi-equilibrium closure to the convection scheme. 

In every directory, each .nc file contains 5 years of model output. There are 5 types of .nc files, which correspond to different output streams of ECHAM6. The main output stream is ..._echam.nc, which has daily-averaged output.

The tendencies for gross deposition (gdep_ls) and gross condensation (gcnd_ls; both with units of kg/m2/s) from the large-scale scheme are in ..._g1am.nc. This is the mean-value stream, which records daily-averaged values. 

The tendencies for gross condensation in convective updrafts are stored in the variable "ddf13" in ..._debugs.nc (units of kg/m2/s). This is another output stream, which records hourly values usually for debugging purposes. The total pressure as a function of height (units of Pa) is stored in the variable "ddf8". Also, the implied surface heat source/sink in the surface energy budget that keeps the surface temperature fixed in time is tracked in the variable "zdf8" (units of W/m2). 

The experimental range of surface temperatures is 290-360 K, which remain fixed as a function of time in the simulations through the use of an artificial heat sink. The simulations are from the ECHAM6 climate model, which we ran in single-column mode.

本数据集为Spaulding-Astudillo与Mitchell（2024a）的研究《松弛振荡对流出现机制的简易模型》配套数据。
主目录采用统一命名规范，例如minimal_1p1S_FSC_335K_N7200：其中1p1S表示太阳常数为当前日地标准值（1360）的1.1倍，FSC代表全天空辐射模拟工况，335 K为固定地表温度，N7200指代准平衡闭合对流方案中对流有效位能（CAPE）的松弛时间尺度为7200秒。
各目录下的每个.nc文件均包含5年的模式输出数据，共涵盖5类.nc文件，分别对应ECHAM6模式的5种输出数据流。核心输出流为*_echam.nc，存储日平均模拟结果。
大尺度方案下的总沉积倾向项（gdep_ls）与总凝结倾向项（gcnd_ls，单位均为kg/m²/s）存储于*_g1am.nc文件中，该数据流为均值流，记录日平均数值。
对流上升气流中的总凝结倾向项存储于*_debugs.nc文件的变量“ddf13”中（单位为kg/m²/s），此为调试用输出流，通常记录逐小时数值。随高度分布的总气压（单位为Pa）存储于变量“ddf8”。此外，为维持地表温度恒定而在地表能量收支中设置的等效地表热源/汇，通过变量“zdf8”进行记录（单位为W/m²）。
本系列模拟的地表温度实验区间为290~360 K，通过人工热汇控制使模拟过程中地表温度不随时间变化。所有模拟均基于ECHAM6气候模式的单柱模式版本运行。