| 1. Identity statement | |
| Reference Type | ePrint (Electronic Source) |
| Site | mtc-m16c.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGP8W/34FHQR2 |
| Repository | sid.inpe.br/mtc-m18@80/2008/12.29.19.09 |
| Last Update | 2008:12.29.19.09.15 (UTC) rosemary@crn.inpe.br |
| Metadata Repository | sid.inpe.br/mtc-m18@80/2008/12.29.19.09.11 |
| Metadata Last Update | 2024:05.10.13.55.37 (UTC) rosemary@crn.inpe.br |
| Citation Key | MungerWolSilLemAlv::SeVaCO |
| Title | Seasonal variability in CO2 and CO gradients across the Amazon  |
| Last Update Date | 2008-12-30 |
| Access Date | 2024, May 18 |
| Type of Medium | On-line |
| Number of Files | 2 |
| Size | 1873 KiB |
| 2. Context | |
| Author | 1 Munger, J. William 2 Wolfsy, S. C. 3 Silva, Francisco Raimundo da 4 Leme, Neusa Paes 5 Alvalá, Plínio Carlos |
| Group | 1 2 3 CRN-CIE-INPE-MCT-BR 4 CRN-CIE-INPE-MCT-BR 5 DAE-CEA-INPE-MCT-BR |
| Affiliation | 1 Harvard University. School of Engineering and Applied Sciences 2 Harvard University. School of Engineering and Applied Sciences 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Instituto Nacional de Pesquisas Espaciais (INPE) 5 Instituto Nacional de Pesquisas Espaciais (INPE) |
| e-Mail Address | rosemary@crn.inpe.br |
| Producer | Instituto Nacional de Pesquisas Espaciais |
| City | São José dos Campos |
| Stage of Alternate Publication | not submitted |
| Progress | ePrint update |
| History (UTC) | 2008-12-29 19:09:15 :: rosemary@crn.inpe.br -> administrator :: 2018-06-04 04:22:57 :: administrator -> rosemary@crn.inpe.br :: |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | work-in-progress |
| Transferable | 1 |
| Keywords | Seasonal variability Amazonas (região) CIÊNCIAS ESPACIAIS E ATMOSFÉRICAS |
| Abstract | Carbon Monoxide (CO) plays a major role in controlling the global levels of OH in the atmosphere, and is a tracer of combustion. In addition CO is generated by photolysis of some hydrocarbons in the atmosphere. Carbon dioxide (CO2) is emitted by biological processes, respiration, as well as combustion and is absorbed by photosynthesis. Atmospheric variability in these species provides information on their net production and loss across the landscape. Both of these gases have been measured at a forested site near Santarem, Para, Brazil (km67 tower site) since 2001- , and at a coastal site, Maxaranguape, north of Natal since 2002. Air at the Maxaranguape site is generally representative of tropical marine air that is transported into the Amazon by easterly tradewind flow, but there is not always direct transport between the sites. Analysis of concentration gradients observed between the two sites helps constrain estimates of the large-scale sources and sinks of these important carbon-containing gases. Mid-day mean concentrations of CO at km 67 site range from a minimum of 66 ppb in May-June, at end of wet season, to a maximum of 400 ppb at peak of local burning season in November. Mid-day CO concentrations at the coastal site range from 40 to 100 ppb without a clear seasonal cycle. The concentration gradient between the sites reaches a maximum exceeding 100 ppb during October and November in response to widespread agricultural burning. Throughout the wet season CO concentrations at the km67 site exceed the coastal concentration by about 40 ppb. Because there is little burning in this season the difference represents contribution from oxidation of biogenic hydrocarbons. The concentration gradient reaches a minimum of about 20 ppb in May-June. CO2 at the forested site has a strong diel cycle, with high concentrations at night and minimum concentrations in the mid afternoon when strong CO2 uptake and dilution by vertical mixing combine to reduce CO2 in the surface layer. Except for some periods with nighttime land breeze that brings elevated CO2 to the coast, there is little or no diel pattern in CO2 concentration at the Maxaranguape site. Although there is considerable day to day variability in the mid-afternoon CO2 concentration at km67, the median value of mid-day CO2 concentration above the forest canopy (378 ppm) is slightly less than the median CO2 concentration in air coming off the ocean at Maxaranguape (380.6 ppm). Long-term continuous CO2 and CO concentration measurements can be a complement to periodic vertical concentration profile measurements and aircraft observations. |
| Area | CEA |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAE > Seasonal variability in... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > CRCRN > Seasonal variability in... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/8JMKD3MGP8W/34FHQR2 |
| zipped data URL | http://urlib.net/zip/8JMKD3MGP8W/34FHQR2 |
| Target File | v1.pdf |
| User Group | administrator rosemary@crn.inpe.br |
| Visibility | shown |
| Read Permission | allow from all |
| Update Permission | transferred to ePrint update |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ETL868 8JMKD3MGPCW/3EUAPES |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.46.31 3 sid.inpe.br/mtc-m21/2012/07.13.14.58.22 1 |
| Host Collection | sid.inpe.br/mtc-m18@80/2008/03.17.15.17 |
| 6. Notes | |
| Empty Fields | accessyear alternatepublication archivingpolicy archivist contenttype copyholder copyright creatorhistory descriptionlevel dissemination doi edition electronicmailaddress format isbn issn label language lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit project readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark secondarytype session shorttitle sponsor subject tertiarymark tertiarytype url versiontype year |
| 7. Description control | |
| e-Mail (login) | rosemary@crn.inpe.br |
| update | |