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Low molecular weight organic acids and aldehydes accounted for less than 5% of the dissolved organic carbon in throughfall at both sites. Formaldehyde at both sites and formate at the mountain\u2010facing site were found at significantly lower concentrations in throughfall than in rainfall, which may be explained by the degradation and\/or retention of these components by the pine canopy as the incident precipitation passed through it. The oxalate concentration in throughfall was significantly higher than those in rainfall at both sites, suggesting that oxalate was derived from leaching from the pine foliage. At both sites, organic acid concentrations were higher in dew on the pine needles than in throughfall or dew on chemically inert surfaces. This could be due to the long contact time of dew on pine needles, during which leached substances from pine needles and dry deposits accumulated on their surfaces can dissolve into the small volume of dew. The role of enhanced concentrations of oxalate in an aqueous phase on the plant surfaces (e.g., dew) is discussed in relation to hydroxyl radical formation via the photo\u2010Fenton reaction.<\/jats:p>","DOI":"10.2134\/jeq2007.0559","type":"journal-article","created":{"date-parts":[[2008,10,23]],"date-time":"2008-10-23T21:26:55Z","timestamp":1224797215000},"page":"2397-2402","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Organic Acids and Aldehydes in Throughfall and Dew in a Japanese Pine Forest"],"prefix":"10.1002","volume":"37","author":[{"given":"Masaaki","family":"Chiwa","sequence":"first","affiliation":[{"name":"Kyushu University Forest, Kyushu Univ. 394 Tsubakuro Sasaguri 811\u20102415 Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takayuki","family":"Miyake","sequence":"additional","affiliation":[{"name":"National Inst. of Polar Research 1\u20109\u201010 Koga, Itabashi\u2010ku Tokyo 173\u20108515 Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nobuhito","family":"Kimura","sequence":"additional","affiliation":[{"name":"Graduate School of Biosphere Science, Hiroshima Univ. 1\u20107\u20101, Kagamiyama Higashi\u2010Hiroshima 739\u20108521 Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Sakugawa","sequence":"additional","affiliation":[{"name":"Graduate School of Biosphere Science, Hiroshima Univ. 1\u20107\u20101, Kagamiyama Higashi\u2010Hiroshima 739\u20108521 Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2008,11]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"crossref","first-page":"4199","DOI":"10.1021\/es062417w","article-title":"Carbon in black crusts from the Tower of London","volume":"41","author":"Bonazza A.","year":"2007","journal-title":"Environ. 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