{"refrec":{"BRefID":75862,"RR":"<b>Schneider, B.; Nausch, G.; Nagel, K.; Wasmund, N.</b> (2003). The surface water CO<sub>2</sub> budget for the Baltic Proper: a new way to determine nitrogen fixation. <i>J. Mar. Syst. 42(1-2)</i>: 53-64. <a href=\"http://dx.doi.org/10.1016/S0924-7963(03)00064-2\" target=\"_blank\">http://dx.doi.org/10.1016/S0924-7963(03)00064-2</a>","BEntID":71531,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>J. Mar. Syst. 42(1-2)</i>: 53-64. <a href=\"https://dx.doi.org/10.1016/S0924-7963(03)00064-2\" target=\"_blank\">https://dx.doi.org/10.1016/S0924-7963(03)00064-2</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Schneider, B.; Nausch, G.; Nagel, K.; Wasmund, N.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Schneider, B. <i>et al.</i>","Englishabstract":"Six cruises were performed in the eastern Gotland Sea in about monthly intervals between March and September 2001 in order to establish a surface water carbon/nitrogen budget and to derive N<sub>2</sub> fixation rates. Balancing the concentration changes of total CO<sub>2</sub> and dissolved organic carbon, the CO<sub>2</sub> air/sea exchange and the effect of mixed layer deepening yielded the net production of particulate organic carbon (POC) for each time interval. A total net production of 3.5 mol m<sup>&#x2212;2</sup> was obtained, which is consistent with earlier estimates of the POC export into the deep water. Measured C/N ratios in the particulate organic matter (POM) were applied to calculate the net formation of particulate organic nitrogen (PON), which was used to balance the nitrogen pools and fluxes. Taking into account the changes in dissolved organic nitrogen, the atmospheric input of NO<sub>3</sub><sup>&#x2212;</sup>/NH<sub>4</sub><sup>+</sup>, and mixed layer deepening, the N<sub>2</sub> fixation was calculated for each period. A total N<sub>2</sub> fixation of 318&#xb1;53 mmol m<sup>&#x2212;2</sup> was obtained, which substantially exceeded any previous estimate for the Baltic Proper (14&#x2013;260 mmol m<sup>&#x2212;2</sup>) and which corresponded to almost twice the spring bloom nitrogen consumption. The temporal distribution was characterized by an unexpected peak (108 mmol m<sup>&#x2212;2</sup>) in late spring that was attributed to the activity of <i>Aphanizomenon</i>. A second maximum (106 mmol m<sup>&#x2212;2</sup>) was found for the June&#x2013;July period when <i>Nodularia</i> dominated the planktonic community.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The surface water CO<sub>2</sub> budget for the Baltic Proper: a new way to determine nitrogen fixation","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Baltic Sea; CO(2) budget; nitrogen fixation","OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2018-05-17","DateCreate":"2005-08-25","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000184713500004","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/S0924-7963(03)00064-2"},"refs":null,"anarec":{"AnaID":75862,"PubliDate":2003,"Pagination":"53-64","XtraPublOfAnaID":null,"ISBN":null,"Volume":"42","Issue":"1-2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43079,"SerRR":"Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam.  ISSN 0924-7963; e-ISSN 1879-1573","StandardTitleSer":"Journal of Marine Systems","ISSN":"0924-7963","AbbrevSer":"J. Mar. 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