Northeast Atlantic Ocean, DIVAnd 4D seasonal 6-year average analysis of Water body chlorophyll-a 1971/2021 v2023 [time][lat][lon], 0.1°, 1973-2018

Northeast Atlantic Ocean - DIVAnd 4D seasonal 6-year average analysis of Water body chlorophyll-a 1971/2021 v2023. Moving 6-year analysis of Water body chlorophyll-a 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 1971/1976 until 2016/2021. Observation data span from 1971 to 2021.
High-frequency observation trails were filtered to a 3h temporal resolution.
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].
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 200km 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: mg/m3.
abstract=Moving 6-year analysis of Water body chlorophyll-a 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 1971/1976 until 2016/2021. Observation data span from 1971 to 2021.
High-frequency observation trails were filtered to a 3h temporal resolution.
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].
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 200km 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: mg/m3.
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/a3461fb1-d209-440e-a49f-7acff7731395
Easternmost_Easting=-0.1
file_name=Water_body_chlorophyll-a.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 10:35:26 2023: ncks -O Water_body_chlorophyll-a.4Danl.nc Water_body_chlorophyll-a.4Danl.nc
id=DatasetScan/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_chlorophyll-a.4Danl.nc
infoUrl=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_chlorophyll-a.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 chlorophyll-a
parameter_keyword_urn=SDN:P35::EPC00105
product_code=Atlantic-Water_body_chlorophyll-a-v2023-ANA
product_id=a3461fb1-d209-440e-a49f-7acff7731395
project=EMODNET Chemistry - Phase 5
search_keywords=Chlorophyll pigment concentrations in water bodies
search_keywords_urn=SDN:P02::CPWC
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_chlorophyll-a.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=1973-02-16T00:00:00Z
Westernmost_Easting=-42.0

东北大西洋水域 - DIVAnd 四维季节性六年平均分析：水生叶绿素a浓度，1971/2021年，版本2023。

对东北大西洋水域每个季节的水生叶绿素a浓度进行六年移动分析：

- 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

时间维度中每年的数据对应于每个季节的六年中心平均值。六年周期从1971/1976年至2016/2021年。观测数据范围从1971年至2021年。

高频观测轨迹被过滤到3小时的时间分辨率。

深度级别（国际海洋学数据交换（IODE）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]。

数据来源：来自SeaDataNet/EMODNet 化学数据网络的观测数据。

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秒地形数据为水团的空间连通性提供支持。生成的DIVAnd地图的水平分辨率为0.1度。水平相关长度在开阔海域区域为200公里，在海岸线处为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和时序的0.1，以考虑时间序列观测中的冗余。在分析之前对数据应用了对数变换（DIVAnd.loglin）。背景场：从包括所有年份的季节数据平均值（垂直过滤的剖面）中减去数据。

数据去趋势：否，应用平流约束：否。

单位：mg/m3。

摘要=东北大西洋水域每个季节水生叶绿素a浓度的六年移动分析：

- 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

时间维度中每年的数据对应于每个季节的六年中心平均值。六年周期从1971/1976年至2016/2021年。观测数据范围从1971年至2021年。

高频观测轨迹被过滤到3小时的时间分辨率。

深度级别（IODE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]。

数据来源：来自SeaDataNet/EMODNet 化学数据网络的观测数据。

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秒地形数据为水团的空间连通性提供支持。生成的DIVAnd地图的水平分辨率为0.1度。水平相关长度在开阔海域区域为200公里，在海岸线处为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和时序的0.1，以考虑时间序列观测中的冗余。在分析之前对数据应用了对数变换（DIVAnd.loglin）。背景场：从包括所有年份的季节数据平均值（垂直过滤的剖面）中减去数据。

数据去趋势：否，应用平流约束：否。

单位：mg/m3。

致谢=综合数据产品由EMODnet Chemistry在DG MARE 招标邀请EASME/2020/OP/0006（EASME/EMFF/2020/3.1.11/Lot 5/SI2.846161）的支持下生成。

区域关键词=东北大西洋海域（40W）

作者电子邮件=Quitterie CAZENAVE <[e-mail]> Julie GATTI <[e-mail]>

地形数据来源=分辨率：0.1度，基于全球GEBCO数字图集，30秒，2014。

数据类型=网格

引用=使用受制于强制引用：

'本资源是在EMODnet Chemistry框架下生成的，在DG MARE 招标邀请EASME/EMFF/2020/3.1.11/European Marine Observation and Data Network (EMODnet) - Lot 5 - Chemistry的支持下。

约定=CF-1.6, COARDS, ACDD-1.3

日期=2023-05-16T16:39:44.282

DIVA 参考文献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 代码DOI=10.5281/zenodo.7016823

DIVAnd 参考文献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 源代码= https://github.com/gher-uliege/DIVAnd.jl

DIVAnd 版本=v2.7.9

DOI= https://doi.org/10.13120/a3461fb1-d209-440e-a49f-7acff7731395

最东端经度=-0.1

文件名=Water_body_chlorophyll-a.4Danl.nc

地理空间纬度最大值=47.9

地理空间纬度最小值=25.0

地理空间纬度分辨率=0.09999999999999999

地理空间纬度单位=北纬度

地理空间经度最大值=-0.1

地理空间经度最小值=-42.0

地理空间经度分辨率=0.09999999999999999

地理空间经度单位=东经度

历史记录=Fri Sep 1 10:35:26 2023: ncks -O Water_body_chlorophyll-a.4Danl.nc Water_body_chlorophyll-a.4Danl.nc

ID=DatasetScan/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_chlorophyll-a.4Danl.nc

信息URL=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_chlorophyll-a.4Danl.nc.html

机构=IFREMER, SISMER, 海洋科学信息系统

机构URN=SDN:EDMO::486

关键词词汇=GCMD 科学关键词

NCO=netCDF Operators版本4.9.9（主页 = http://nco.sf.net，代码 = https://github.com/nco/nco）

最北端纬度=47.9

参数关键词=水生叶绿素a

参数关键词URN=SDN:P35::EPC00105

产品代码=Atlantic-Water_body_chlorophyll-a-v2023-ANA

产品ID=a3461fb1-d209-440e-a49f-7acff7731395

项目=EMODNET Chemistry - 第5阶段

搜索关键词=水生中叶绿素色素浓度

搜索关键词URN=SDN:P02::CPWC

来源=来自SeaDataNet/EMODnet 化学数据网络的观测数据

来源URL=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_chlorophyll-a.4Danl.nc

最南端纬度=25.0

标准名称词汇=CF 标准名称表 v70

时间范围结束=2018-11-16T00:00:00Z

时间范围开始=1973-02-16T00:00:00Z

最西端经度=-42.0