Seasonal investigation of ultrafine particle composition in an eastern Amazonian rainforest

Reports on the composition of ultrafine (<100 nm in diameter) particles in the Amazon are scarce, due in part to the fact that new particle formation has rarely been observed near ground level.  Ultrafine particles near the surface have nevertheless been observed, leaving open questions regarding the sources and chemistry of their formation and growth, particularly as these vary across seasons.  Here we present measurements on the composition of ultrafine particles collected in the Tapaj\'{o}s National Forest (2.857° S, 54.959° W) during three different seasonal periods: 10 - 30 September 2016 (SEP), 18 November - 23 December 2016 (DEC), and 22 May - 21 June 2017 (JUN).  Size-selected (5 - 70 nm) particles were collected daily (22 h) using an offline sampler.  Samples collected during the three time periods were compiled and analyzed using liquid chromatography coupled to Orbitrap high resolution mass spectrometry.  Our findings suggest a sustained influence of isoprene organosulfate..., Date of data collection: 2016-09 to 2017-06
Geographic location of data collection:  Santarém-Km67-Primary Forest (BR-Sa1) tower site (2.857° S, 54.959° W),Pára, Brazil.
Other details regarding these measurements can be found in the associated manuscript:
Thomas, A. E., Glicker, H. S., Guenther, A. B., Seco, R., Vega Bustillos, O., Tota, J., Souza, R. A. F., and Smith, J. N.: Seasonal Investigation of Ultrafine Particle Composition in an Eastern Amazonian Rainforest, Atmos. Chem. Phys., , # Data from: Seasonal investigation of ultrafine particle composition in an eastern Amazonian rainforest

This readme file was generated on 2024-07-16 by Adam Thomas

**GENERAL INFORMATION**

Author/Principal Investigator Information

Name: James Smith

ORCID: 0000-0003-4677-8224

Institution: University of California, Irvine

Address: Rowland Hall Room 317C, Irvine, CA 92697

Email: [[e-mail]](mailto:[e-mail])

Author/Associate or Co-investigator Information

Name: Adam Thomas

Institution: University of California, Irvine

Address: Irvine, CA 92697

Email: [[e-mail]](mailto:[e-mail])

Date of data collection: 2016-09 to 2017-06

Geographic location of data collection: Santarém-Km67-Primary Forest (BR-Sa1) tower site (2.857° S, 54.959° W),Pára, Brazil.

Information about funding sources that supported the collection of the data:

Brazilian Science Mobility Program (Programa Ciência sem Fronteiras) Special Visiting Researcher Scholarship supported by the B...

亚马孙地区超细（直径<100纳米）颗粒物组成的相关研究报道较为匮乏，部分原因在于地面附近的新粒子生成现象罕有被观测到。不过地表附近的超细颗粒物已被观测到，这留下了关于其生成与增长的来源及化学过程的诸多未解问题，尤其考虑到这些过程随季节发生变化。
本研究展示了在塔帕若斯国家森林公园（南纬2.857°，西经54.959°）三个不同季节时段采集的超细颗粒物组成的测量结果：2016年9月10日至30日（9月）、2016年11月18日至12月23日（12月）以及2017年5月22日至6月21日（6月）。
研究采用离线采样器每日采集时长22小时的粒径分选（5~70纳米）颗粒物样品。对三个采样时段收集的样品进行汇总，并采用液相色谱联用Orbitrap高分辨质谱法进行分析。本研究结果显示异戊二烯有机硫酸盐持续产生影响……
数据采集日期：2016年9月至2017年6月
数据采集地理点位：巴西帕拉州圣塔伦-Km67原生林（BR-Sa1）铁塔观测点（南纬2.857°，西经54.959°）。
有关本测量的更多细节可参见相关学术论文：
Thomas, A. E., Glicker, H. S., Guenther, A. B., Seco, R., Vega Bustillos, O., Tota, J., Souza, R. A. F., and Smith, J. N.: Seasonal Investigation of Ultrafine Particle Composition in an Eastern Amazonian Rainforest, Atmos. Chem. Phys., , # Data from: Seasonal investigation of ultrafine particle composition in an eastern Amazonian rainforest
本说明文件由Adam Thomas于2024年7月16日生成。

**基本信息**

### 项目负责人/主要研究者信息
姓名：James Smith
ORCID：0000-0003-4677-8224
所属机构：加州大学欧文分校（University of California, Irvine）
通讯地址：加州欧文市Rowland Hall 317C室，邮编92697
电子邮箱：[e-mail]

### 合作者/副研究者信息
姓名：Adam Thomas
所属机构：加州大学欧文分校（University of California, Irvine）
通讯地址：加州欧文市，邮编92697
电子邮箱：[e-mail]

数据采集时段：2016年9月至2017年6月
数据采集地理点位：巴西帕拉州圣塔伦-Km67原生林（BR-Sa1）铁塔观测点（南纬2.857°，西经54.959°）。

本数据采集工作的资助来源：巴西科学流动计划（Programa Ciência sem Fronteiras）专项访问研究者奖学金由B……资助