<codeBook xmlns="ddi:codebook:2_5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="ddi:codebook:2_5 https://ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" version="2.5" xml:lang="en"><docDscr><citation><titlStmt><titl xml:lang="en">Long-term chlorophyll a concentrations in Lake Balaton (1965–2025)</titl><IDNo agency="handle">hdl:21.15109/ARP/ATDTAE</IDNo></titlStmt><distStmt><distrbtr source="archive">ARP</distrbtr><distDate>2026-03-26</distDate></distStmt><verStmt source="archive"><version date="2026-03-26" type="RELEASED">1</version></verStmt><biblCit>Somogyi, Boglárka, 2026, "Long-term chlorophyll a concentrations in Lake Balaton (1965–2025)", https://hdl.handle.net/21.15109/ARP/ATDTAE, ARP, V1</biblCit></citation></docDscr><stdyDscr><citation><titlStmt><titl xml:lang="en">Long-term chlorophyll a concentrations in Lake Balaton (1965–2025)</titl><IDNo agency="handle">hdl:21.15109/ARP/ATDTAE</IDNo></titlStmt><rspStmt><AuthEnty affiliation="HUN-REN Balaton Limnological Research Institute">Somogyi, Boglárka</AuthEnty></rspStmt><prodStmt/><distStmt><distrbtr source="archive">ARP</distrbtr><contact affiliation="HUN-REN Balaton Limnological Research Institute" email="somogyi.boglarka@blki.hu">Somogyi, Boglárka</contact><depositr>Somogyi, Boglárka</depositr><depDate>2026-03-06</depDate></distStmt><holdings URI="https://hdl.handle.net/21.15109/ARP/ATDTAE"/></citation><stdyInfo><subject><keyword xml:lang="en">Earth and Environmental Sciences</keyword></subject><abstract date="2026-03-06" xml:lang="en">This dataset contains chlorophyll a concentration values measured by the HUN-REN Balaton Limnological Research Institute at two sampling sites located in Lake Balaton.</abstract><sumDscr/></stdyInfo><method><dataColl><sources/></dataColl><anlyInfo/></method><dataAccs><setAvail/><useStmt/><notes type="DVN:TOA" level="dv">Please contact the researcher via email and provide a detailed description of the intended use of the data for research purposes.</notes><notes type="DVN:TOU" level="dv">&lt;a href="http://creativecommons.org/licenses/by-nc-sa/4.0">CC BY-NC-SA 4.0&lt;/a></notes></dataAccs><othrStdyMat><relPubl><citation><titlStmt><titl>Somogyi, B., Li, H., Tapolczai, K., Kovács, A. W., G.-Tóth, L., Horváth, H., … Vörös, L. (2024). Regime shift in microalgal dynamics: Impact of water level changes on planktonic and benthic algal biomass. SCIENCE OF THE TOTAL ENVIRONMENT, 929. 

Li, H., Somogyi, B., Chen, X., Luo, Z., Blix, K., Wu, S., … Tóth, V. R. (2025). Leveraging Landsat and Google Earth Engine for long-term chlorophyll-a monitoring: A case study of Lake Balaton’s water quality. ECOLOGICAL INFORMATICS, 90. http://doi.org/10.1016/j.ecoinf.2025.103245</titl><IDNo agency="doi">http://doi.org/10.1016/j.scitotenv.2024.172351</IDNo></titlStmt><biblCit>Somogyi, B., Li, H., Tapolczai, K., Kovács, A. W., G.-Tóth, L., Horváth, H., … Vörös, L. (2024). Regime shift in microalgal dynamics: Impact of water level changes on planktonic and benthic algal biomass. SCIENCE OF THE TOTAL ENVIRONMENT, 929. 

Li, H., Somogyi, B., Chen, X., Luo, Z., Blix, K., Wu, S., … Tóth, V. R. (2025). Leveraging Landsat and Google Earth Engine for long-term chlorophyll-a monitoring: A case study of Lake Balaton’s water quality. ECOLOGICAL INFORMATICS, 90. http://doi.org/10.1016/j.ecoinf.2025.103245</biblCit></citation><ExtLink URI="http://doi.org/10.1016/j.ecoinf.2025.103245"/></relPubl></othrStdyMat></stdyDscr><otherMat ID="f2162474" URI="https://repo.researchdata.hu/api/access/datafile/2162474" level="datafile"><labl>Long_term_chlorophyll_Balaton2.csv</labl><txt>data</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">text/csv</notes></otherMat><otherMat ID="f2162473" URI="https://repo.researchdata.hu/api/access/datafile/2162473" level="datafile"><labl>ReADME_klorofill.pdf</labl><txt>readme hungarian</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/pdf</notes></otherMat><otherMat ID="f2162475" URI="https://repo.researchdata.hu/api/access/datafile/2162475" level="datafile"><labl>ReADME_klorofill_angol.pdf</labl><txt>readme</txt><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/pdf</notes></otherMat></codeBook>