Qian Yu, Zimeng Zhang, Piaopiao Ke, Jiale Chang, Han Li, Wenjia Wang, Lei Duan, Ronghua Kang, Lei Zhang, Yu Zhao
{"title":"Land-Air Exchanges of Various Gaseous Nitrogen Species in an Urban Wetland Based on In Situ Flux Observations","authors":"Qian Yu, Zimeng Zhang, Piaopiao Ke, Jiale Chang, Han Li, Wenjia Wang, Lei Duan, Ronghua Kang, Lei Zhang, Yu Zhao","doi":"10.1029/2024GL113265","DOIUrl":null,"url":null,"abstract":"<p>Wetlands are universally recognized as hotspots for nitrogen cycling and gaseous nitrogen emissions. In this study, the fluxes of nitric oxide (NO), nitrogen dioxide (NO<sub>2</sub>), ammonia (NH<sub>3</sub>), and nitrous oxide (N<sub>2</sub>O) were observed seasonally in the mud and waterfront plots of an urban wetland in eastern China using a dynamic flux chamber. The results revealed that the fluxes of NO, NO<sub>2</sub>, and NH<sub>3</sub> displayed a diurnal pattern of higher values during the day and lower values at night, which was opposite to that of N<sub>2</sub>O. The average annual emissions of NO, NH<sub>3</sub>, and N<sub>2</sub>O were 0.16 ± 0.04, 0.59 ± 0.03, and 8.81 ± 0.44 kg N ha<sup>−1</sup> yr<sup>−1</sup>, respectively. Conversely, NO<sub>2</sub> exhibited deposition, with an annual flux of 1.51 ± 0.03 kg N ha<sup>−1</sup> yr<sup>−1</sup>. Given the evolving area of urban wetlands, the emissions of gaseous nitrogen, particularly N<sub>2</sub>O, deserve substantial attention.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 5","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL113265","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL113265","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Wetlands are universally recognized as hotspots for nitrogen cycling and gaseous nitrogen emissions. In this study, the fluxes of nitric oxide (NO), nitrogen dioxide (NO2), ammonia (NH3), and nitrous oxide (N2O) were observed seasonally in the mud and waterfront plots of an urban wetland in eastern China using a dynamic flux chamber. The results revealed that the fluxes of NO, NO2, and NH3 displayed a diurnal pattern of higher values during the day and lower values at night, which was opposite to that of N2O. The average annual emissions of NO, NH3, and N2O were 0.16 ± 0.04, 0.59 ± 0.03, and 8.81 ± 0.44 kg N ha−1 yr−1, respectively. Conversely, NO2 exhibited deposition, with an annual flux of 1.51 ± 0.03 kg N ha−1 yr−1. Given the evolving area of urban wetlands, the emissions of gaseous nitrogen, particularly N2O, deserve substantial attention.
湿地是公认的氮循环和气态氮排放热点。本研究利用动态通量室对中国东部某城市湿地泥地和滨水地块的一氧化氮（NO）、二氧化氮（NO2）、氨（NH3）和氧化亚氮（N2O）的季节性通量进行了观测。结果表明，NO、NO2和NH3的通量呈白天高、夜晚低的日变化规律，与N2O相反。NO、NH3和N2O的年平均排放量分别为0.16±0.04、0.59±0.03和8.81±0.44 kg N ha−1 yr−1。相反，NO2表现为沉积，年通量为1.51±0.03 kg N ha−1 yr−1。考虑到城市湿地面积的不断变化，气态氮的排放，特别是N2O的排放值得高度关注。
期刊介绍：
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
