氯自由基对大气氧化能力具有重要影响。氯胺（尤其是三氯胺）是氯自由基的一类新型前体物。然而，其大气来源及环境作用目前尚不明确。\n
本数据集基于北京地区野外观测，结合新德里同步观测数据与多伦多历史观测再分析，提供了大气三氯胺一次排放与二次生成路径的实地证据。研究证实：大气气溶胶中由氯气与氨气触发的逐级氯化反应是三氯胺的重要来源。气溶胶内生成的三氯胺可释放为气态三氯胺，并在氯气向氯自由基转化过程中充当关键中间产物；同时，三氯胺直接排放是一类长期被忽视的氯自由基来源。总体而言，氯胺化学改变了氯自由基的生成机制，是全球尺度下氯自由基生成过程中缺失的关键途径。\n
本数据包括了论文配套的数据和模型代码。", "ds_source": "", "ds_process_way": "", "ds_quality": "", "ds_acq_start_time": "2022-01-01 00:00:00", "ds_acq_end_time": "2023-03-31 00:00:00", "ds_acq_place": "北京,新德里", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "open-access", "ds_total_size": 51127529, "ds_files_count": 0, "ds_format": "*.xlsx,*mat", "ds_space_res": "", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "873a775f-8280-417a-ae11-1ccf638db83f.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "0a4269e1-65f4-45f1-aeba-88ea3068eebf", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.1515" ], "quality_level": 0, "publish_time": "2026-05-11 15:10:20", "last_updated": "2026-05-14 16:53:32", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.atmosphere.db7322.2026", "i18n": { "en": { "title": "Data and codes for the paper \"Chloramine chemistry as a missing link in atmospheric chlorine cycling\"", "ds_format": "*.xlsx,*mat", "ds_source": "", "ds_quality": "", "ds_ref_way": "", "ds_abstract": "
Chlorine radicals (Cl·) profoundly affect atmospheric oxidation capacity. Chloramines, especially trichloramine, are emerging precursors of Cl·. However, their sources and roles in the atmosphere remain elusive. This study presents field evidence of primary emissions and explicit secondary production pathways of atmospheric trichloramine in Beijing, supplemented by observations from New Delhi and reanalysis of measurements in Toronto. We demonstrate that the sequential chlorination reactions initiated by molecular chlorine and ammonia in atmospheric aerosols are a major source of trichloramine. The trichloramine produced in aerosols is a source of gaseous trichloramine and serves as an intermediate during the conversion from molecular chlorine to Cl·, while direct trichloramine emissions constitute a previously overlooked source of Cl·. 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