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

Northeast Atlantic Ocean - DIVAnd 4D seasonal 6-year average analysis of Water body dissolved inorganic nitrogen 1971/2021 v2023. Moving 6-year analysis of Water body dissolved inorganic nitrogen 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.
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 400km 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 dissolved inorganic nitrogen 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.
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 400km 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=2023-05-17T16:13:16.298
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/fde9b782-cb3d-4c83-9f4c-2546b78e092f
Easternmost_Easting=-0.1
file_name=Water_body_dissolved_inorganic_nitrogen.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 10:35:43 2023: ncks -O Water_body_dissolved_inorganic_nitrogen.4Danl.nc Water_body_dissolved_inorganic_nitrogen.4Danl.nc
id=DatasetScan/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_dissolved_inorganic_nitrogen.4Danl.nc
infoUrl=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/By_sea_regions/Northeast_Atlantic_Ocean/Water_body_dissolved_inorganic_nitrogen.4Danl.nc.html
institution=IFREMER, SISMER, Scientific Information Systems for the SEA
institution_urn=SDN:EDMO::486
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 dissolved inorganic nitrogen
parameter_keyword_urn=SDN:P35::EPC00198
product_code=Atlantic-Water_body_dissolved_inorganic_nitrogen-v2023-ANA
product_id=fde9b782-cb3d-4c83-9f4c-2546b78e092f
project=EMODNET Chemistry - Phase 5
search_keywords=Dissolved inorganic nitrogen concentration in the water column
search_keywords_urn=SDN:P02::TDIN
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_dissolved_inorganic_nitrogen.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

东北大西洋海洋区域 - DIVAnd 4D 季节性 6年逐季平均分析数据集：水体溶解无机氮，时间跨度为1971年至2021年，数据版本为2023年。该分析采用6年滑动窗口对东北大西洋水体中溶解无机氮进行逐季分析：

- 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6年中心平均。6年周期从1971/1976年至2016/2021年。观测数据范围从1971年至2021年。

深度级别（基于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 化学数据网络提供的观测数据。

DIVAnd分析描述：计算采用DIVAnd（n维数据插值变分分析）版本2.7.4进行，使用GEBCO 30秒地形数据确定水团的空间连通性。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400公里，在沿海地区为50公里。垂直相关长度定义为垂直分辨率的二倍。信号与噪声比在垂直剖面中固定为1，在时间序列中固定为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：从数据中减去包括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，应用了平流约束：否。

单位：umol/l。

摘要=东北大西洋水体溶解无机氮的逐季6年滑动分析：

- 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6年中心平均。6年周期从1971/1976年至2016/2021年。观测数据范围从1971年至2021年。

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, 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 化学数据网络提供的观测数据。

DIVAnd分析描述：计算采用DIVAnd（n维数据插值变分分析）版本2.7.4进行，使用GEBCO 30秒地形数据确定水团的空间连通性。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400公里，在沿海地区为50公里。垂直相关长度定义为垂直分辨率的二倍。信号与噪声比在垂直剖面中固定为1，在时间序列中固定为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：从数据中减去包括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，应用了平流约束：否。

单位：umol/l。

致谢=由EMODnet Chemistry在DG MARE招标呼吁EASME/2020/OP/0006（EASME/EMFF/2020/3.1.11/European Marine Observation and Data Network (EMODnet) - Lot 5 - Chemistry）的支持下生成。

区域关键词=东北大西洋海洋（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数字大图，30秒，2014。

数据类型=网格

引用=使用本资源需强制引用：

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

约定=CF-1.6, COARDS, ACDD-1.3

日期=2023-05-17T16:13:16.298

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/fde9b782-cb3d-4c83-9f4c-2546b78e092f

最东经=-0.1

文件名=Water_body_dissolved_inorganic_nitrogen.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=Fri Sep 1 10:35:43 2023: ncks -O Water_body_dissolved_inorganic_nitrogen.4Danl.nc Water_body_dissolved_inorganic_nitrogen.4Danl.nc

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

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

机构=IFREMER, SISMER, 海洋科学信息系统

机构URN=SDN:EDMO::486

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

最北纬度=47.9

参数关键词=水体溶解无机氮

参数关键词URN=SDN:P35::EPC00198

产品代码=Atlantic-Water_body_dissolved_inorganic_nitrogen-v2023-ANA

产品ID=fde9b782-cb3d-4c83-9f4c-2546b78e092f

项目=EMODNET Chemistry - 第五阶段

搜索关键词=水柱中溶解无机氮浓度

搜索关键词URN=SDN:P02::TDIN

来源=SeaDataNet/EMODnet 化学数据网络提供的观测数据

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

最南纬度=25.0

标准名称词汇=CF标准名称表v70

时间覆盖结束=2018-11-16T00:00:00Z

时间覆盖开始=1973-02-16T00:00:00Z

最西经=-42.0