Dataset: ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Gravimetric Mass Balance from GRACE data, derived by TU Dresden, v1.2#

Dataset identifier: esacci.ICESHEETS.yr.Unspecified.GMB.GRACE-instrument.GRACE.UNSPECIFIED.1-2.greenland_gmb_mass_trends
Data store: cciodp

How to open this dataset in AVL JupyterLab  ⧉

cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.ICESHEETS.yr.Unspecified.GMB.GRACE-instrument.GRACE.UNSPECIFIED.1-2.greenland_gmb_mass_trends')

Bounding box map#

Map tiles and data from OpenStreetMap, under the ODbL.

Basic information#

Parameter	Value
Bounding box longitude (°)	-80.0 to -10.0
Bounding box latitude (°)	60.0 to 90.0
Time range	2002-03-31 to 2016-08-31
Time period	1Y

Click here for full dataset metadata.

Variable list#

Click on a variable name to jump to the variable’s full metadata.

Variable	Long name	Units
t	average time for time slice	days since 2003-01-01 00:00:00
start_time	start of time span	days since 2003-01-01 00:00:00
end_time	end of time span	days since 2003-01-01 00:00:00
GMB_trend	mass trend for time span	kg m-2 yr-1

Full variable metadata#

t#

Field	Value
long_name	average time for time slice
standard_name	time
units	days since 2003-01-01 00:00:00
axis	T
calendar	gregorian
orig_data_type	float64
fill_value	None
size	10
shape	10
chunk_sizes	10
file_chunk_sizes	10
data_type	float64
dimensions	time
file_dimensions	time

start_time#

Field	Value
long_name	start of time span
units	days since 2003-01-01 00:00:00
orig_data_type	float64
fill_value	None
size	10
shape	10
chunk_sizes	10
file_chunk_sizes	10
data_type	float64
dimensions	time
file_dimensions	time

end_time#

Field	Value
long_name	end of time span
units	days since 2003-01-01 00:00:00
orig_data_type	float64
fill_value	None
size	10
shape	10
chunk_sizes	10
file_chunk_sizes	10
data_type	float64
dimensions	time
file_dimensions	time

GMB_trend#

Field	Value
long_name	mass trend for time span
standard_name	tendency_of_change_in_land_ice_amount
units	kg m-2 yr-1
units_comments	kg m-2 yr-1 corresponds to mm water equivalent per year
source	GRACE - ITSG-Grace2016
coordinates	latitude longitude
orig_data_type	float64
fill_value	None
size	7240
shape	10, 724
chunk_sizes	10, 724
file_chunk_sizes	10, 724
data_type	float64
dimensions	time, meas_ind
file_dimensions	time, meas_ind

crs#

Field	Value
semi_major_axis	6378137.
inverse_flattening	298.257223563
spatial_ref	GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.01745329251994328,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]]
grid_mapping_name	latitude_longitude
longitude_of_prime_meridian	0
DODS	strlen: 0
orig_data_type	bytes1024
size	1
shape	1
chunk_sizes	1
file_chunk_sizes	1
data_type	bytes1024
dimensions
file_dimensions

Full dataset metadata#

Field	Value
project	Greenland_Ice_Sheet_cci
source	GRACE monthly solutions provided by TU Graz (ITSG-Grace2016)
product_version	1-2
ecv	ICESHEETS
institute	Technische Universität Dresden
processing_level	Unspecified
product_string	UNSPECIFIED
data_type	GMB
sensor_id	GRACE-instrument
platform_id	GRACE
abstract	This dataset provides the Gravitational Mass Balance (GMB) product derived from gravimetry data from the GRACE satellite instrument, by TU Dresden. The data consists of two products: a mass change time series for the entire Greenland Ice Sheet and different drainage basins for the period April 2002 to August 2016; and mass trend grids for different 5-year periods between 2003 and 2016. This version (1.2) is derived from GRACE monthly solutions provided by TU Graz (ITSG-Grace 2016) The mass change time series contains the mass change (with respect to a chosen reference month) for all of the Greenland Ice Sheet and each individual drainage basin. For each month (defined by a decimal year) a mass change in Gt and its associated error (also in Gt) is provided. The mass trend grid product is given in units of mm water equivalent per year. Mass balance is an important variable to understand glacial thinning and ablation rates to enable mapping glacier area change. The time series allows the longer term comparison of trends whereas the mass trend grids provide a yearly snapshot which can be further analysed and compared across the data set. Basin definitions and further data descriptions can be found in the Algorithm Theoretical Baseline Document (ST-DTU-ESA-GISCCI-ATBD-001_v3.1.pdf) and Product Specification Document (ST-DTU-ESA-GISCCI-PSD_v2.2.pdf) which are provided on the Greenland Ice Sheet CCI project website. This GMB product has been produced by TU Dresden for comparison with the existing GMB product derived by DTU Space. Please cite the dataset as follows: Groh, A., & Horwath, M. (2016). The method of tailored sensitivity kernels for GRACE mass change estimates. Geophysical Research Abstracts, 18, EGU2016-12065
title	ESA Greenland Ice Sheet Climate Change Initiative (Greenland_Ice_Sheet_cci): Greenland Gravimetric Mass Balance from GRACE data, derived by TU Dresden, v1.2
publication_date	2018-11-28T16:59:20
uuid	b017235a8e544d6fbad21387ebfbf0d8
catalog_url	https://catalogue.ceda.ac.uk/uuid/b017235a8e544d6fbad21387ebfbf0d8
cci_project	ICESHEETS