Northeast Atlantic Ocean, DIVAnd 4D seasonal 6-year average analysis of Water body silicate 1950/2021 v2023 [time][lat][lon], 0.1°, 1952-2018

Northeast Atlantic Ocean - DIVAnd 4D seasonal 6-year average analysis of Water body silicate 1950/2021 v2023. Moving 6-year analysis of Water body silicate in the NorthEast Atlantic for each season:
- winter: January-March,
- spring: April-June,
- summer: July-September,
- autumn: October-December.
Every year of the time dimension corresponds to the 6-year centred average of each season. 6-year periods span from 1950/1955 until 2016/2021. Observation data span from 1950 to 2021.
Depth levels (International Oceanographic Data Exchange (IODE) standard depths): [0.0, 5.0, 10.0, 20.0, 30.0, 40.0, 50.0, 75.0, 100.0, 125.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1000.0, 1100.0, 1200.0, 1300.0, 1400.0, 1500.0, 1750.0, 2000.0].
Data sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Descrption of DIVAnd analysis: the computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.4, using GEBCO 30 sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps is 0.1 degrees. Horizontal correlation length varies from 300km in open sea regions to 50km at the coast. Vertical correlation length is defined as twice the vertical resolution. Signal-to-noise ratio was fixed to 1 for vertical profiles and 0.1 for time series to account for the redundancy in the time series observations. A logarithmic transformation (DIVAnd.loglin) was applied to the data prior to the analysis. Background field: a vertically-filtered profile of the seasonal data mean value (including all years) is substracted from the data.
Detrending of data: no, advection constraint applied: no.
Units: umol/l.
abstract=Moving 6-year analysis of Water body silicate in the NorthEast Atlantic for each season:
- winter: January-March,
- spring: April-June,
- summer: July-September,
- autumn: October-December.
Every year of the time dimension corresponds to the 6-year centred average of each season. 6-year periods span from 1950/1955 until 2016/2021. Observation data span from 1950 to 2021.
Depth levels (IODE standard depths): [0.0, 5.0, 10.0, 20.0, 30.0, 40.0, 50.0, 75.0, 100.0, 125.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1000.0, 1100.0, 1200.0, 1300.0, 1400.0, 1500.0, 1750.0, 2000.0].
Data sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Descrption of DIVAnd analysis: the computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.4, using GEBCO 30 sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps is 0.1 degrees. Horizontal correlation length varies from 300km in open sea regions to 50km at the coast. Vertical correlation length is defined as twice the vertical resolution. Signal-to-noise ratio was fixed to 1 for vertical profiles and 0.1 for time series to account for the redundancy in the time series observations. A logarithmic transformation (DIVAnd.loglin) was applied to the data prior to the analysis. Background field: a vertically-filtered profile of the seasonal data mean value (including all years) is substracted from the data.
Detrending of data: no, advection constraint applied: no.
Units: umol/l.
Acknowledgements=Aggregated data products are generated by EMODnet Chemistry under the support of DG MARE Call for Tenders EASME/2020/OP/0006 (EASME/EMFF/2020/3.1.11/Lot 5/SI2.846161).
area_keywords=Northeast Atlantic Ocean (40W)
area_keywords_urn=SDN:C19::SVX00015
Author_email=Quitterie CAZENAVE <[e-mail]> Julie GATTI <[e-mail]>
bathymetry_source=resolution: 0.1 degree, based on the global GEBCO Digital Atlas, 30 sec, 2014
cdm_data_type=Grid
citation=Usage is subject to mandatory citation: "This resource was generated in the framework of EMODnet Chemistry, under the support of DG MARE Call for Tender EASME/EMFF/2020/3.1.11/European Marine Observation and Data Network (EMODnet) - Lot 5 - Chemistry"
Conventions=CF-1.6, COARDS, ACDD-1.3
date=2023-05-16T16:39:44.282
DIVA_references=Barth, A., Beckers, J.-M., Troupin, C., Alvera-Azcarate, A., and Vandenbulcke, L. (2014): divand-1.0: n-dimensional variational data analysis for ocean observations, Geosci. Model Dev., 7, 225-241, doi: 10.5194/gmd-7-225-2014
DIVAnd_code_doi=10.5281/zenodo.7016823
DIVAnd_references=Barth, A.; Beckers, J.-M.; Troupin, C.; Alvera-Azcarate, A & Vandenbulcke, L. divand-1.0: n-dimensional variational data analysis for ocean observations. Geoscientific Model Development, 2014, 7, 225-241. DOI: 10.5194/gmd-7-225-2014
DIVAnd_source=https://github.com/gher-uliege/DIVAnd.jl
DIVAnd_version=v2.7.9
doi=https://doi.org/10.13120/076887b2-bab2-42fc-af1d-25e68ee6006d
Easternmost_Easting=-0.1
file_name=Water_body_silicate.4Danl.nc
geospatial_lat_max=47.9
geospatial_lat_min=25.0
geospatial_lat_resolution=0.09999999999999999
geospatial_lat_units=degrees_north
geospatial_lon_max=-0.1
geospatial_lon_min=-42.0
geospatial_lon_resolution=0.09999999999999999
geospatial_lon_units=degrees_east
history=Fri Sep 1 10:37:56 2023: ncks -O Water_body_silicate.4Danl.nc Water_body_silicate.4Danl.nc
id=DatasetScan/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_silicate.4Danl.nc
infoUrl=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_silicate.4Danl.nc.html
institution=IFREMER, SISMER, Scientific Information Systems for the SEA
institution_urn=SDN:EDMO::486
keywords_vocabulary=GCMD Science Keywords
NCO=netCDF Operators version 4.9.9 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)
Northernmost_Northing=47.9
parameter_keyword=Water body silicate
parameter_keyword_urn=SDN:P35::EPC00008
product_code=Atlantic-Water_body_silicate-v2023-ANA
product_id=076887b2-bab2-42fc-af1d-25e68ee6006d
project=EMODNET Chemistry - Phase 5
search_keywords=Silicate concentration parameters in the water column
search_keywords_urn=SDN:P02::SLCA
source=observational data from SeaDataNet/EMODnet Chemistry Data Network
sourceUrl=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_silicate.4Danl.nc
Southernmost_Northing=25.0
standard_name_vocabulary=CF Standard Name Table v70
time_coverage_end=2018-11-16T00:00:00Z
time_coverage_start=1952-02-16T00:00:00Z
Westernmost_Easting=-42.0

东北大西洋 - DIVAnd 四维季节性六年平均水体硅酸盐分析（1950/2021 年，版本 2023）。对东北大西洋水体硅酸盐进行逐季六年移动分析：

- 冬季：一月至三月
- 春季：四月至六月
- 夏季：七月至九月
- 秋季：十月至十二月

时间维度中的每年对应于每个季节的六年中心平均值。六年周期从 1950/1955 年至 2016/2021 年。观测数据范围从 1950 年至 2021 年。

深度等级（国际海洋学数据交换标准深度）：[0.0, 5.0, 10.0, 20.0, 30.0, 40.0, 50.0, 75.0, 100.0, 125.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0, 600.0, 700.0, 800.0, 900.0, 1000.0, 1100.0, 1200.0, 1300.0, 1400.0, 1500.0, 1750.0, 2000.0]。

数据来源：SeaDataNet/EMODNet 化学数据网络观测数据。
DIVAnd 分析描述：计算使用 DIVAnd（n 维数据插值变分分析），版本 2.7.4，利用 GEBCO 30 秒地形数据构建水体空间连通性。生成的 DIVAnd 地图的水平分辨率为 0.1 度。水平相关长度在公海区域为 300 公里，在海岸线附近为 50 公里。垂直相关长度定义为垂直分辨率的二倍。信号与噪声比固定为垂直剖面的 1 和时间序列的 0.1，以考虑时间序列观测的冗余。在分析之前对数据应用了对数变换（DIVAnd.loglin）。背景场：从数据中减去包含所有年份的季节数据平均值的垂直过滤剖面。
数据去趋势：否，应用平流约束：否。
单位：umol/l。