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NOAH_geoDB/D15N (ImageServer)

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Service Description: The ratio of two stable isotopes (14N, 15N) in sediments reflects the origin and history of nitrogen in the water column and is an indicator for eutrophication. Sedimentary nitrogen mirrors the isotope ratio of dissolved nitrate that has been assimilated into organic matter by plankton and has sedimented as detritus. The ratio is expressed as 𗉟N values of nitrogen, and is given in permil (‰) relative to the ratio of the standard (𗉟N in air N2 = 0‰). In the German Bight and EEZ, the dissolved nitrate that is assimilated and transferred to sedimentary nitrogen originates from 2 main sources with distinct isotopic composition: Nitrate discharged by rivers draining cultivated catchments has high 𗉟N values (~ 9‰); such high values are a characteristic of riverborne nitrate that causes eutrophication of coastal areas. In contrast, nitrate in water masses of Atlantic origin advected into the German Bight with the mean circulation has low 𗉟N values (~5‰). The map of 𗉟N values in surface sediments (0-1 cm) collected in the German Bight and German EEZ depicts the halo of man-made eutrophication resulting from nitrate with tell-tale high 𗉟N discharged by rivers. Analysis of 𗉟N in dated sediment cores puts the onset of eutrophication near 1900 AD, expressed by a marked (by 1.5‰) increase of 𗉟N values at that time, which indicates the input of surplus nitrogen from rivers at that time .

Name: NOAH_geoDB/D15N

Description: The ratio of two stable isotopes (14N, 15N) in sediments reflects the origin and history of nitrogen in the water column and is an indicator for eutrophication. Sedimentary nitrogen mirrors the isotope ratio of dissolved nitrate that has been assimilated into organic matter by plankton and has sedimented as detritus. The ratio is expressed as 𗉟N values of nitrogen, and is given in permil (‰) relative to the ratio of the standard (𗉟N in air N2 = 0‰). In the German Bight and EEZ, the dissolved nitrate that is assimilated and transferred to sedimentary nitrogen originates from 2 main sources with distinct isotopic composition: Nitrate discharged by rivers draining cultivated catchments has high 𗉟N values (~ 9‰); such high values are a characteristic of riverborne nitrate that causes eutrophication of coastal areas. In contrast, nitrate in water masses of Atlantic origin advected into the German Bight with the mean circulation has low 𗉟N values (~5‰). The map of 𗉟N values in surface sediments (0-1 cm) collected in the German Bight and German EEZ depicts the halo of man-made eutrophication resulting from nitrate with tell-tale high 𗉟N discharged by rivers. Analysis of 𗉟N in dated sediment cores puts the onset of eutrophication near 1900 AD, expressed by a marked (by 1.5‰) increase of 𗉟N values at that time, which indicates the input of surplus nitrogen from rivers at that time .

Single Fused Map Cache: false

Extent: Initial Extent: Full Extent: Pixel Size X: 0.0367858210100557

Pixel Size Y: 0.0367858210100557

Band Count: 1

Pixel Type: F32

RasterFunction Infos: {"rasterFunctionInfos": [ { "name": "D15NStretched", "description": "A raster function template.", "help": "" }, { "name": "None", "description": "", "help": "" } ]}

Mensuration Capabilities: Basic

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : false

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: HZG Helmholtz-Zentrum Geesthacht

Service Data Type: esriImageServiceDataTypeGeneric

Min Values: 5.438692569732666

Max Values: 11.470184326171875

Mean Values: 7.964956423150728

Standard Deviation Values: 0.912403001891898

Object ID Field:

Fields: None

Default Mosaic Method: Center

Allowed Mosaic Methods:

SortField:

SortValue: null

Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Nearest

Max Record Count: null

Max Image Height: 4100

Max Image Width: 15000

Max Download Image Count: null

Max Mosaic Image Count: null

Allow Raster Function: true

Allow Compute TiePoints: false

Supports Statistics: false

Supports Advanced Queries: false

Use StandardizedQueries: true

Raster Type Infos: Has Raster Attribute Table: false

Edit Fields Info: null

Ownership Based AccessControl For Rasters: null

Child Resources:   Info   Histograms   Key Properties   Legend   MultiDimensionalInfo   rasterFunctionInfos

Supported Operations:   Export Image   Identify   Measure   Compute Histograms   Compute Statistics Histograms   Get Samples   Compute Class Statistics   Query Boundary