Volcanic SO2 data derived from limb viewing satellites for the lower stratosphere from 1998 to 2012, and from nadir viewing satellites for the troposphere
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This directory (experiment) contains volcanic SO2 data derived from limb viewing satellites for the lower stratosphere from 1998 to 2012. The usage of the data is described in Timmreck et al., (2018), datasets VolcDB1 and VolcDB1_3D.
We provide 3D-plumes of observed volume mixing ratio perturbations in the lower stratosphere / upper
troposphere typically derived from 10-day periods as nc-files and integrated values of injected SO2 mass with peak
latitudes and altitudes as Fortran formatted ascii files (A11,5(1X,I3),I4,4(1X,I3),5(1X,I2),I3,4(1X,I2)) for at
maximum 5 events at one time. Instead of A11 I2,I5,I5 can be used to read in the components of time. The data from
Dec. 1997 to Jan. 2002 are based on L2-files of SAGE II (V7.0) provided by the NASA DAAC (Thomason et al., 2008).
The data from Jul. 2002 to Mar. 2012 use the updated 5-day time series of MIPAS (Hoepfner et al., 2015),
supplemented by SO2 derived from GOMOS extinctions (Bingen et al., 2017, with a corresponding table).
SO2volc3D_pap_T42L90r.nc: 3D SO2 for 131 events in T42L90 resolution (ECHAM-grid in grid_T42L90.nc) surface to
about 80km)..
SO2volc3D_pap_T63L90r.nc: same in T63L90 resolution (ECHAM-grid in grid_T63L90.nc). Here a downscaling by
0.7 for low latitude eruptions is recommended because of less removal by overshooting convection (The data
in the T42 file and in the table in Bingen et al 2017 were upscaled within the measurement uncertainty to
overcome the model artifact in low resolution, this applies only for the ENVISAT part from Jul. 2002 on).
Latitude from South to North, for use with ECHAM please reverse. The levels on the hybrid-grid in the grid
files are defined as lev(x,y,z)=hyam(z)+hybm(z)*apsave(x,y), in Pa (apsave annual average of surface pressure
or orography).
Volcano_or_region_echam_merged_dd_mm_yyyy.txt: integrated SO2 mass injected (in kt), SAGE and ENVISAT period.
The postscript-file is an example on the T42 grid, the *doc-file includes the volcano names for the data in
the *.txt Files, see also http://wwww.volcano.si.edu (Smithsonian volcano database).
AEROCOM-DIEHL_UMZ1_tropo11.nc: Fluxes from outgassing volcanoes in the troposphere (below 200hPa), taken
from AEROCOM (Diehl, 2012; Caution, filled with odd climatology after 2009, monthly, beginning in Jan. 1950)
AEROCOM-DIEHL_1297-0312_tropo11.nc: Subset beginning Dec. 1997.
本目录(实验)包含1998年至2012年期间由 limb viewing 卫星获取的平流层下层火山 SO2 数据。数据使用说明请参阅 Timmreck 等人(2018)发表的 VolcDB1 和 VolcDB1_3D 数据集。我们提供了平流层下层/对流层上层观测到的体积混合比扰动(通常来源于为期10天的周期)的3D羽流数据,并以 nc 文件格式提供,同时提供注入的 SO2 质量积分值,包括峰值纬度和海拔,并以 Fortran 格式的 ASCII 文件(A11,5(1X,I3),I4,4(1X,I3),5(1X,I2),I3,4(1X,I2))存储,每次最多5个事件。除 A11 外,I2,I5,I5 也可用于读取时间成分。1997年12月至2002年1月的数据基于 NASA DAAC 提供的 SAGE II (V7.0) L2 文件(Thomason 等人,2008年)。2002年7月至2012年3月的数据使用更新后的 MIPAS 5日时间序列(Hoepfner 等人,2015年),并由 GOMOS 消光法得到的 SO2 补充(Bingen 等人,2017年,附有相应表格)。SO2volc3D_pap_T42L90r.nc:T42L90 分辨率下131个事件的3D SO2数据,覆盖地表至约80公里高度。SO2volc3D_pap_T63L90r.nc:与 T42L90 分辨率相同,但在低纬度火山爆发时建议进行0.7倍的下尺度处理,因为超射对流的影响较小(T42 文件和Bingen 等人2017年的表格中的数据在测量不确定性范围内进行了上尺度处理,以克服低分辨率模型中的伪影,此方法仅适用于2002年7月之后的 ENVISAT 部分)。纬度从南至北排列,与 ECHAM 模型配合使用时请反转。混合网格文件中的层通过 lev(x,y,z)=hyam(z)+hybm(z)*apsave(x,y) 定义,单位为帕斯卡(apsave 为年表面压力或地形平均值)。Volcano_or_region_echam_merged_dd_mm_yyyy.txt:综合注入的 SO2 质量(以千吨计),SAGE 和 ENVISAT 时期。Postscript 文件是 T42 网格的示例,*doc 文件包含 *.txt 文件中数据对应的火山名称,请参阅 http://wwww.volcano.si.edu(Smithsonian 火山数据库)。AEROCOM-DIEHL_UMZ1_tropo11.nc:来自对流层(200hPa以下)火山喷发气体的通量,数据来源于 AEROCOM(Diehl,2012年;注意,2009年之后的数据中包含异常的气候统计,每月数据,始于1950年1月)。AEROCOM-DIEHL_1297-0312_tropo11.nc:从1997年12月开始的数据子集。
提供机构:
World Data Center for Climate (WDCC) at DKRZ



