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    567 Widespread deoxygenation of temperate lakes - Müggelsee data

    Title
    Widespread deoxygenation of temperate lakes - Müggelsee data
    Period
    1997-01-30 till 2009-12-07
    Period length
    12 years 10 months 8 days
    Description

    The concentration of oxygen dissolved in water regulates many aspects of aquatic ecosystems, including habitat suitability for biota, greenhouse gas emissions, nutrient cycling, and metal toxicity. However, little is known about how dissolved oxygen (DO) concentrations in lakes are changing through time. The solubility of oxygen in water declines with increasing water temperatures, but other temperature-sensitive processes may suppress or amplify trends through time, making long-term observations essential to understanding DO dynamics and trends.

    This dataset includes measurements of dissolved oxygen and temperature from 1/30/1979 to 12/7/2009 at  Müggelsee.

    Keywords
    deoxygenation, temperate lakes, dissolved oxygen
    Study site
    Müggelsee
    Sampling locations
    Müggelsee M7
    location
    52.434983, 13.658983
    location
    code
    M7
    description

    Deepest point in Müggelsee

    Parameters

    physics:

    secchi depth
    name
    secchi depth
    description

    synonyms
    Sichttiefe, Transparancy
    water temperature
    name
    water temperature
    description

    determination by temperature-probe

    synonyms
    water temp, Wassertemperatur

    chemistry:

    O, oxygen concentration
    name
    O, oxygen concentration
    description

    determination by oxygen-probe

    synonyms
    Sauerstoffkonzentration
    O, oxygen saturation
    name
    O, oxygen saturation
    description

    determination by oxygen-probe

    synonyms
    Sauerstoffsättigung

    biology:

    chlorophyll a
    name
    chlorophyll a
    description

    Attention: There are two different methods:

    HPLC - High Performance Liquid Chromatography (ex situ)

    YSI - Chlorophyll Sensor in Multiparameter probe (in situ)

    synonyms
    Chlorophyllkonzentration, alpha-chlorophyll
    Contact
    Rita Adrian
    Licence for data
    All rights reserved. Please send a request to Rita Adrian if you like to use this data. Mind our data policy: IGB Data Policy
    Current doi
    10.18728/568.0

    Data files (e.g. excel)

    TitlecreatedFiletypeActions
    Temp_and_DO_Profiles.csv 10. Feb. 2021 18:07 datatable: .csv
    Error: To access file, please get in touch with the contact person.
    Secchi_depth.csv 10. Feb. 2021 18:07 datatable: .csv
    Error: To access file, please get in touch with the contact person.
    Productivity.csv 10. Feb. 2021 18:07 datatable: .csv
    Error: To access file, please get in touch with the contact person.

    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 freeODC-ByLicence.

    • Widespread_deoxygenation_of_temperate_lakes_-_Müggelsee_data_.xml
    • Widespread_deoxygenation_of_temperate_lakes_-_Müggelsee_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)