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957 Global lake morphometries and nutrient loads suggest widespread occurrence of alternative equilibria - code and raw data

DOI Info:

  • DOI: 10.18728/igb-fred-957.0
  • How to cite: Daniel Langenhaun (2025-01-07 ) Global lake morphometries and nutrient loads suggest widespread occurrence of alternative equilibria - code and raw data. IGB Leibniz-Institute of Freshwater Ecology and Inland Fisheries. dataset. https://doi.org/10.18728/igb-fred-957.0
  • DOI history

    Date DOI PackageId Note
    2025-01-0710.18728/igb-fred-957.0957this package latest
Title
Global lake morphometries and nutrient loads suggest widespread occurrence of alternative equilibria - code and raw data
Sampling interval
Irregular Interval
Description

The model run outputs folder contains all year 30 (equilibrium) data of the different runs carried out using PCLake+.

The .zip archive contains the code in R, the input raw data and model output files.

Each file is named according to its depth and fetch combination value. Files contain info on numerous model variables, specifically: time,sDepthW,aDVeg,oNH4WEpi,oNO3WEpi,oPO4WEpi,oO2WEpi,oDDiatWEpi,oDGrenWEpi,oDBlueWEpi,oDZooEpi,oDSestWEpi,oPTotWEpi,oNTotWEpi,oChlaEpi. Variable names correspond to PCLake+ variables in standard model nomenclature. Additionally, the files contain info on int (used model integrator, corresponding to those available in the deSolve package in R), depth (depth of the lake), fetch (fetch of the lake) ,period (differentiating if days of the year are considered winter or summer half-year), year (year of the run, always equals 30), PLoad (the Phosphorus load forced onto the model, N load is linked with a factor 10) , initstate (initial state, either clear or turbid). The file bifurc_full contains an aggregate of the different combinations of runs of depth and fetch, wherein the summer average values are reported rather than all daily values of the last year.

Species Groups
Study site
_misc
Contact
Sabine Hilt
Licence for data
All rights reserved. Please send a request to Sabine Hilt if you like to use this data. Mind our data policy: IGB Data Policy

Data files (e.g. excel)

TitlecreatedFiletypeActions
Hilt_StateShiftPaper_Fig2and4.zip 07. Jan. 2025 13:21 datatable: .zip Download

Machine Readable Metadata Files

FRED provides all metadata of this package in a maschine readable format. There is a pure XML file and one EML file in Ecological Metadata Language. Both files are published under the free CC BY 4.0 Licence.

  • Global_lake_morphometries_and_nutrient_loads_suggest_widespread_occurrence_of_alternative_equilibria_-_code_and_raw_data.xml
  • Global_lake_morphometries_and_nutrient_loads_suggest_widespread_occurrence_of_alternative_equilibria_-_code_and_raw_data.eml

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Parsing data File

Estimated Time:

Why does it take so much time?

While parsing a file, the database has to perform various tasks, some of them needs a lot of CPU and memory for larger files.

  • preprocessing: means automatic detection of headlines, table body, format values or csv-separators
  • copying: means read the file cell by cell and copy all elements to the database. During this format settings can be calculated (for example iso-time)
  • analyzing: check out for different data types (can be time, numeric or text)