The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry
<p>In the period between 9 and 11 July 2014, a friagem event reached the Amazon region. On 11 July, the southwest flow related to the friagem converged with the easterly winds in the central Amazon. The interaction between these two distinct air masses formed a convection band, which intensifi...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2021-01-01
|
| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/21/339/2021/acp-21-339-2021.pdf |
| _version_ | 1818613275908112384 |
|---|---|
| author | G. F. Camarinha-Neto J. C. P. Cohen J. C. P. Cohen C. Q. Dias-Júnior M. Sörgel M. Sörgel J. H. Cattanio J. H. Cattanio A. Araújo S. Wolff S. Wolff P. A. F. Kuhn R. A. F. Souza L. V. Rizzo P. Artaxo |
| author_facet | G. F. Camarinha-Neto J. C. P. Cohen J. C. P. Cohen C. Q. Dias-Júnior M. Sörgel M. Sörgel J. H. Cattanio J. H. Cattanio A. Araújo S. Wolff S. Wolff P. A. F. Kuhn R. A. F. Souza L. V. Rizzo P. Artaxo |
| author_sort | G. F. Camarinha-Neto |
| collection | DOAJ |
| description | <p>In the period
between 9 and 11 July 2014, a friagem event reached the Amazon region.
On 11 July, the southwest flow related to the friagem
converged with the easterly winds in the central Amazon. The interaction between these two distinct air masses
formed a convection band, which intensified over the Manaus region and the Amazon Tall Tower Observatory (ATTO) site. The
satellite images show the evolution of convective activity on 11 July, which led to 21 mm of precipitation at
the ATTO site. Moreover, the arrival of the friagem caused a sudden drop in temperature and a predominance of southerly
winds, which could be seen in Porto Velho between 7 and 8 July and in Manaus and the ATTO site from 9 to
11 July. The results of ERA-Interim reanalysis and Brazilian developments on the Regional Atmospheric Modeling System
(BRAMS) simulations show that this friagem event coming from the southwest, carries a mass of air with higher O<span class="inline-formula"><sub>3</sub></span>
and NO<span class="inline-formula"><sub>2</sub></span> mixing ratios and lower CO mixing ratio compared to the air masses
present in the central Amazon. At Lake Balbina, the friagem intensifies the local circulations, such as the breeze phenomena.
In the Manaus region and at the ATTO site, the main effects of the friagem event are a decrease in the incoming solar radiation
(due to intense cloud formation), a large temperature drop and a distinct change in surface O<span class="inline-formula"><sub>3</sub></span> and CO<span class="inline-formula"><sub>2</sub></span>
mixing ratios. As the cold air of the friagem was just in the lower
<span class="inline-formula">500</span> m the most probable cause of this change is that
a cold pool above the forest prevented vertical mixing causing accumulation of CO<span class="inline-formula"><sub>2</sub></span> from respiration and very
low O<span class="inline-formula"><sub>3</sub></span> mixing ratio due to photochemistry reduction and limited mixing within the boundary layer.</p> |
| first_indexed | 2024-12-16T15:59:32Z |
| format | Article |
| id | doaj.art-9fa94cc19fbd450cab318c9b24a73cff |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-16T15:59:32Z |
| publishDate | 2021-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-9fa94cc19fbd450cab318c9b24a73cff2022-12-21T22:25:30ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242021-01-012133935610.5194/acp-21-339-2021The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistryG. F. Camarinha-Neto0J. C. P. Cohen1J. C. P. Cohen2C. Q. Dias-Júnior3M. Sörgel4M. Sörgel5J. H. Cattanio6J. H. Cattanio7A. Araújo8S. Wolff9S. Wolff10P. A. F. Kuhn11R. A. F. Souza12L. V. Rizzo13P. Artaxo14Postgraduate Program on Environmental Sciences – PPGCA, Federal University of Pará (UFPA), Belém, PA, BrazilPostgraduate Program on Environmental Sciences – PPGCA, Federal University of Pará (UFPA), Belém, PA, BrazilFaculty of Meteorology, Federal University of Pará (UFPA), Belém, PA, BrazilDepartment of Physics, Federal Institute of Pará (IFPA), Belém, PA, BrazilBiogeochemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, 55020 Mainz, Germanycurrently at: Atmospheric Chemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, 55020 Mainz, GermanyPostgraduate Program on Environmental Sciences – PPGCA, Federal University of Pará (UFPA), Belém, PA, BrazilFaculty of Meteorology, Federal University of Pará (UFPA), Belém, PA, BrazilEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Belém, PA, BrazilBiogeochemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, 55020 Mainz, Germanycurrently at: Multiphase Chemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, 55020 Mainz, GermanyPostgraduate Program on Environmental Sciences – PPGCA, Federal University of Pará (UFPA), Belém, PA, BrazilDepartment of Meteorology, Amazonas State University (UEA), Manaus, Amazonas, BrazilDepartment of Environmental Sciences, Institute of Environmental, Chemical and Pharmaceutics Sciences, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, BrazilInstitute of Physics, University of São Paulo (USP), São Paulo, São Paulo, Brazil<p>In the period between 9 and 11 July 2014, a friagem event reached the Amazon region. On 11 July, the southwest flow related to the friagem converged with the easterly winds in the central Amazon. The interaction between these two distinct air masses formed a convection band, which intensified over the Manaus region and the Amazon Tall Tower Observatory (ATTO) site. The satellite images show the evolution of convective activity on 11 July, which led to 21 mm of precipitation at the ATTO site. Moreover, the arrival of the friagem caused a sudden drop in temperature and a predominance of southerly winds, which could be seen in Porto Velho between 7 and 8 July and in Manaus and the ATTO site from 9 to 11 July. The results of ERA-Interim reanalysis and Brazilian developments on the Regional Atmospheric Modeling System (BRAMS) simulations show that this friagem event coming from the southwest, carries a mass of air with higher O<span class="inline-formula"><sub>3</sub></span> and NO<span class="inline-formula"><sub>2</sub></span> mixing ratios and lower CO mixing ratio compared to the air masses present in the central Amazon. At Lake Balbina, the friagem intensifies the local circulations, such as the breeze phenomena. In the Manaus region and at the ATTO site, the main effects of the friagem event are a decrease in the incoming solar radiation (due to intense cloud formation), a large temperature drop and a distinct change in surface O<span class="inline-formula"><sub>3</sub></span> and CO<span class="inline-formula"><sub>2</sub></span> mixing ratios. As the cold air of the friagem was just in the lower <span class="inline-formula">500</span> m the most probable cause of this change is that a cold pool above the forest prevented vertical mixing causing accumulation of CO<span class="inline-formula"><sub>2</sub></span> from respiration and very low O<span class="inline-formula"><sub>3</sub></span> mixing ratio due to photochemistry reduction and limited mixing within the boundary layer.</p>https://acp.copernicus.org/articles/21/339/2021/acp-21-339-2021.pdf |
| spellingShingle | G. F. Camarinha-Neto J. C. P. Cohen J. C. P. Cohen C. Q. Dias-Júnior M. Sörgel M. Sörgel J. H. Cattanio J. H. Cattanio A. Araújo S. Wolff S. Wolff P. A. F. Kuhn R. A. F. Souza L. V. Rizzo P. Artaxo The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry Atmospheric Chemistry and Physics |
| title | The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry |
| title_full | The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry |
| title_fullStr | The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry |
| title_full_unstemmed | The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry |
| title_short | The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry |
| title_sort | friagem event in the central amazon and its influence on micrometeorological variables and atmospheric chemistry |
| url | https://acp.copernicus.org/articles/21/339/2021/acp-21-339-2021.pdf |
| work_keys_str_mv | AT gfcamarinhaneto thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jcpcohen thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jcpcohen thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT cqdiasjunior thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT msorgel thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT msorgel thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jhcattanio thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jhcattanio thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT aaraujo thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT swolff thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT swolff thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT pafkuhn thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT rafsouza thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT lvrizzo thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT partaxo thefriagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT gfcamarinhaneto friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jcpcohen friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jcpcohen friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT cqdiasjunior friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT msorgel friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT msorgel friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jhcattanio friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT jhcattanio friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT aaraujo friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT swolff friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT swolff friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT pafkuhn friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT rafsouza friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT lvrizzo friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry AT partaxo friagemeventinthecentralamazonanditsinfluenceonmicrometeorologicalvariablesandatmosphericchemistry |