Northeast Atlantic Ocean, Loire River, DIVAnd 4D seasonal analysis of Water body chlorophyll-a 1971/2021 v2023 [time][depth][lat][lon], 1996

Northeast Atlantic Ocean - Loire River - DIVAnd 4D seasonal analysis of Water body chlorophyll-a 1971/2021 v2023. Seasonal climatology of Water body chlorophyll-a for Loire river for the period 1971-2021 and for the following seasons:
- winter: January-March,
- spring: April-June,
- summer: July-September,
- autumn: October-December.
Observation data span from 1971 to 2021.
Depth levels (m): [0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 20.0, 25.0, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0, 110.0, 120.0, 130.0].
Data sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Description of DIVAnd analysis: the computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.4, using GEBCO 15 sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps is 0.01 degrees. Horizontal correlation length is defined seasonally (in meters): 14000 (winter), 52000 (spring), 42000 (summer), 125000 (autumn). Vertical correlation length was optimized and vertically filtered and a seasonally-averaged profile was used (DIVAnd.fitvertlen). 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: the vertically-filtered data mean profile is substracted from the data. Detrending of data: no, advection constraint applied: no.
Units: mg/m3.
abstract=Seasonal climatology of Water body chlorophyll-a for Loire river for the period 1971-2021 and for the following seasons:
- winter: January-March,
- spring: April-June,
- summer: July-September,
- autumn: October-December.
Observation data span from 1971 to 2021.
Depth levels (m): [0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 20.0, 25.0, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0, 110.0, 120.0, 130.0].
Data sources: observational data from SeaDataNet/EMODNet Chemistry Data Network.
Description of DIVAnd analysis: the computation was done with DIVAnd (Data-Interpolating Variational Analysis in n dimensions), version 2.7.4, using GEBCO 15 sec topography for the spatial connectivity of water masses. The horizontal resolution of the produced DIVAnd maps is 0.01 degrees. Horizontal correlation length is defined seasonally (in meters): 14000 (winter), 52000 (spring), 42000 (summer), 125000 (autumn). Vertical correlation length was optimized and vertically filtered and a seasonally-averaged profile was used (DIVAnd.fitvertlen). 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: the vertically-filtered data mean profile 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=2023-05-16T17:48:27.701
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/10.13120/9fc08bf8-e5f9-42a1-b2dd-edcfb898e362
Easternmost_Easting=-1.0099315643310547
file_name=Water_body_chlorophyll-a.nc
geospatial_lat_max=47.99970626831055
geospatial_lat_min=46.25
geospatial_lat_resolution=0.009998321533203125
geospatial_lat_units=degrees_north
geospatial_lon_max=-1.0099315643310547
geospatial_lon_min=-4.010000228881836
geospatial_lon_resolution=0.010000228881835938
geospatial_lon_units=degrees_east
history=Tue Aug 29 17:02:50 2023: ncks -O Water_body_chlorophyll-a.nc Water_body_chlorophyll-a.nc
id=DatasetScan/emodnet-projects/v2023/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.nc
infoUrl=http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.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=47.99970626831055
parameter_keyword=Water body chlorophyll-a
parameter_keyword_urn=SDN:P35::EPC00105
product_code=Loire-Water_body_chlorophyll-a-v2023-ANA
product_id=9fc08bf8-e5f9-42a1-b2dd-edcfb898e362
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/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.nc
Southernmost_Northing=46.25
standard_name_vocabulary=CF Standard Name Table v70
time_coverage_end=1996-11-16T00:00:00Z
time_coverage_start=1996-02-16T00:00:00Z
Westernmost_Easting=-4.010000228881836

东北大西洋海域-卢瓦尔河区域，DIVAnd 四维季节性水体叶绿素-a 分析（1971/2021 年版，2023 年更新）。涵盖1971年至2021年期间及以下季节的卢瓦尔河水体叶绿素-a的季节气候学分析：

- 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

观测数据范围为1971年至2021年。

深度层次（米）：[0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 20.0, 25.0, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0, 110.0, 120.0, 130.0]。

数据来源：SeaDataNet/EMODNet 化学数据网络观测数据。
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，利用GEBCO 15秒地形数据确定水体空间连通性。生成的DIVAnd地图的水平分辨率为0.01度。水平相关长度按季节定义（以米为单位）：冬季14000米，春季52000米，夏季42000米，秋季125000米。垂直相关长度经过优化并垂直滤波，使用季节平均剖面（DIVAnd.fitvertlen）。为考虑时间序列观测中的冗余，垂直剖面信噪比固定为1，时间序列为0.1。在分析之前对数据应用了对数变换（DIVAnd.loglin）。背景场：从数据中减去垂直滤波后的数据平均剖面。数据去趋势：否，应用平流约束：否。

单位：毫克/立方米。

摘要=卢瓦尔河1971-2021年及以下季节水体叶绿素-a的季节气候学。
观测数据范围：1971年至2021年。
深度层次（米）：[0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 20.0, 25.0, 30.0, 35.0, 40.0, 45.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0, 110.0, 120.0, 130.0]。
数据来源：SeaDataNet/EMODNet 化学数据网络观测数据。
DIVAnd 分析描述：使用DIVAnd（n维数据插值变分分析），版本2.7.4，利用GEBCO 15秒地形数据确定水体空间连通性。生成的DIVAnd地图的水平分辨率为0.01度。水平相关长度按季节定义（以米为单位）：冬季14000米，春季52000米，夏季42000米，秋季125000米。垂直相关长度经过优化并垂直滤波，使用季节平均剖面（DIVAnd.fitvertlen）。为考虑时间序列观测中的冗余，垂直剖面信噪比固定为1，时间序列为0.1。在分析之前对数据应用了对数变换（DIVAnd.loglin）。背景场：从数据中减去垂直滤波后的数据平均剖面。数据去趋势：否，应用平流约束：否。

单位：毫克/立方米。

致谢：数据产品由EMODnet Chemistry生成，得到DG MARE 招标邀请EASME/2020/OP/0006（EASME/EMFF/2020/3.1.11/Lot 5/SI2.846161）的支持。
区域关键词：东北大西洋海域（40W）
作者邮箱：Quitterie CAZENAVE <[e-mail]> Julie GATTI <[e-mail]>
地形来源：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：使用本资源需进行强制引用：“本资源是在EMODnet Chemistry框架内生成的，得到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。”
规范：CF-1.6, COARDS, ACDD-1.3
日期：2023-05-16T17:48:27.701
DIVA 参考文献列表：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
DIVA 参考文献列表：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/10.13120/9fc08bf8-e5f9-42a1-b2dd-edcfb898e362
最东经度：-1.0099315643310547
文件名：Water_body_chlorophyll-a.nc
地理空间纬度最大值：47.99970626831055
地理空间纬度最小值：46.25
地理空间纬度分辨率：0.009998321533203125
地理空间纬度单位：北纬度
地理空间经度最大值：-1.0099315643310547
地理空间经度最小值：-4.010000228881836
地理空间经度分辨率：0.010000228881835938
地理空间经度单位：东经度
历史记录：Tue Aug 29 17:02:50 2023: ncks -O Water_body_chlorophyll-a.nc Water_body_chlorophyll-a.nc
标识符：DatasetScan/emodnet-projects/v2023/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.nc
信息URL：http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.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：47.99970626831055
参数关键词：水体叶绿素-a
参数关键词URN：SDN:P35::EPC00105
产品代码：Loire-Water_body_chlorophyll-a-v2023-ANA
产品ID：9fc08bf8-e5f9-42a1-b2dd-edcfb898e362
项目：EMODNET Chemistry - 第五阶段
搜索关键词：水体中叶绿素色素浓度
搜索关键词URN：SDN:P02::CPWC
来源：SeaDataNet/EMODnet 化学数据网络观测数据
来源URL：http://opendap.oceanbrowser.net/thredds/dodsC/data/emodnet-projects/v2023/Coastal_areas/Northeast_Atlantic_Ocean_-_Loire_River/Water_body_chlorophyll-a.nc
最南纬度：46.25
标准名称词汇：CF 标准名称表 v70
时间覆盖结束：1996-11-16T00:00:00Z
时间覆盖开始：1996-02-16T00:00:00Z
最西经度：-4.010000228881836