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  1. AU="Spracklen, D."
  2. AU="Lobo, Brian C"
  3. AU=Zhuang Jianjian AU=Zhuang Jianjian
  4. AU=Pathanki Adithya M
  5. AU="Armando Vilchis-Ordoñez"
  6. AU="Zhongfu Lu"
  7. AU="Lo, Hong-Yip"
  8. AU="Ziman Xiong"
  9. AU="Oakes, Allison H"
  10. AU="Ma, Shaotong"
  11. AU="Zang, Lili"
  12. AU="Adams Brian D"
  13. AU="Maria Papaioannou"
  14. AU="Kollia, Georgia"
  15. AU="Auxiette, Catherine"
  16. AU="Guzmán, Luis"
  17. AU="Alipour, Elnaz"
  18. AU="Queiroz, Dayanna Joyce Marques"
  19. AU="Ramamurthy, Santosh"
  20. AU="Xueying Huang"
  21. AU="Cromwell, Howard C"
  22. AU="Spence, John C H"
  23. AU="Chapinal, Libertad"
  24. AU=Rohaim Mohammed A AU=Rohaim Mohammed A
  25. AU=Hempel Cornelius

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Treffer 1 - 10 von insgesamt 82

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  1. Artikel ; Online: Modeling early warning signs of possible Amazon Forest dieback.

    Spracklen, D V / Coelho, C A S

    Science advances

    2023  Band 9, Heft 40, Seite(n) eadk5670

    Abstract: Deforestation of the Amazon may reach a critical point where abrupt declines in rainfall could cause widespread forest dieback. ...

    Abstract Deforestation of the Amazon may reach a critical point where abrupt declines in rainfall could cause widespread forest dieback.
    Mesh-Begriff(e) Trees ; Conservation of Natural Resources ; Forests ; Brazil
    Sprache Englisch
    Erscheinungsdatum 2023-10-04
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adk5670
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Tropical deforestation causes large reductions in observed precipitation.

    Smith, C / Baker, J C A / Spracklen, D V

    Nature

    2023  Band 615, Heft 7951, Seite(n) 270–275

    Abstract: Tropical forests play a critical role in the hydrological cycle and can influence local and regional ... ...

    Abstract Tropical forests play a critical role in the hydrological cycle and can influence local and regional precipitation
    Mesh-Begriff(e) Congo ; Conservation of Natural Resources/trends ; Forests ; Trees ; Tropical Climate ; Rain ; Forestry ; Water Cycle
    Sprache Englisch
    Erscheinungsdatum 2023-03-01
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-022-05690-1
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  3. Artikel: Divergent Representation of Precipitation Recycling in the Amazon and the Congo in CMIP6 Models.

    Baker, J C A / Spracklen, D V

    Geophysical research letters

    2022  Band 49, Heft 10, Seite(n) e2021GL095136

    Abstract: Moisture evaporated from the land contributing to precipitation in a given area is known as precipitation recycling and needs to be accurately represented in climate models. The Amazon and Congo basins are reported to have the highest precipitation ... ...

    Abstract Moisture evaporated from the land contributing to precipitation in a given area is known as precipitation recycling and needs to be accurately represented in climate models. The Amazon and Congo basins are reported to have the highest precipitation recycling rates globally, but model representation has not yet been assessed over these regions. We evaluated recycling over the Amazon and Congo in 45 Coupled Model Intercomparison Project Phase 6 models. Regional annual means from models and reanalyzes agreed well over both basins. Models captured seasonal variation in recycling over the Congo but there was a large-scale underestimation of recycling during the Amazon dry-to-wet transition season relative to ERA5, caused by models underestimating Amazon evapotranspiration and overestimating incoming wind speed and associated water vapor imports. Both regions show robust declines in precipitation recycling over the next century under future climate-change scenarios. Our results suggest models may underestimate impacts of deforestation on regional precipitation in the Amazon.
    Sprache Englisch
    Erscheinungsdatum 2022-05-13
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 7403-2
    ISSN 0094-8276
    ISSN 0094-8276
    DOI 10.1029/2021GL095136
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  4. Artikel ; Online: The impact of COVID-19 control measures on air quality in China

    Silver, B / He, X / Arnold, SR / Spracklen, DV

    2020  

    Abstract: The outbreak of Coronavirus Disease 2019 (COVID-19) in China in January 2020 prompted substantial control measures including social distancing measures, suspension of public transport and industry, and widespread cordon sanitaires ('lockdowns'), that ... ...

    Abstract The outbreak of Coronavirus Disease 2019 (COVID-19) in China in January 2020 prompted substantial control measures including social distancing measures, suspension of public transport and industry, and widespread cordon sanitaires ('lockdowns'), that have led to a decrease in industrial activity and air pollution emissions over a prolonged period. We use a 5 year dataset from China's air quality monitoring network to assess the impact of control measures on air pollution. Pollutant concentration time series are decomposed to account for the inter-annual trend, seasonal cycles and the effect of Lunar New Year, which coincided with the COVID-19 outbreak. Over 2015–2019, there were significant negative trends in particulate matter (PM2.5, −6% yr−1) and sulphur dioxide (SO2, −12% yr−1) and nitrogen dioxide (NO2, −2.2% yr−1) whereas there were positive trends in ozone (O3, + 2.8% yr−1). We quantify the change in air quality during the LNY holiday week, during which pollutant concentrations increase on LNY's day, followed by reduced concentrations in the rest of the week. After accounting for interannual trends and LNY we find NO2 and PM concentrations were significantly lower during the lockdown period than would be expected, but there were no significant impacts on O3. Largest reductions occurred in NO2, with concentrations 27.0% lower on average across China, during the lockdown. Average concentrations of PM2.5 and PM10 across China were respectively 10.5% and 21.4% lower during the lockdown period. The largest reductions were in Hubei province, where NO2 concentrations were 50.5% lower than expected during the lockdown. Concentrations of affected pollutants returned to expected levels during April, after control measures were relaxed.
    Schlagwörter covid19
    Thema/Rubrik (Code) 333
    Erscheinungsdatum 2020-07-28
    Verlag IOP Publishing
    Erscheinungsland uk
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel: Relationship Between Fire and Forest Cover Loss in Riau Province, Indonesia Between 2001 and 2012

    Adrianto, H. A / Arnold, S. R / Spracklen, D. V

    Forests. 2019 Oct. 08, v. 10, no. 10

    2019  

    Abstract: Forest and peatland fires occur regularly across Indonesia, resulting in large greenhouse gas emissions and causing major air quality issues. Over the last few decades, Indonesia has also experienced extensive forest loss and conversion of natural forest ...

    Abstract Forest and peatland fires occur regularly across Indonesia, resulting in large greenhouse gas emissions and causing major air quality issues. Over the last few decades, Indonesia has also experienced extensive forest loss and conversion of natural forest to oil palm and timber plantations. Here we used data on fire hotspots and tree-cover loss, as well as information on the extent of peat land, protected areas, and concessions to explore spatial and temporal relationships among forest, forest loss, and fire frequency. We focus on the Riau Province in Central Sumatra, one of the most active regions of fire in Indonesia. We find strong relationships between forest loss and fire at the local scale. Regions with forest loss experienced six times as many fire hotspots compared to regions with no forest loss. Forest loss and maximum fire frequency occurred within the same year, or one year apart, in 70% of the 1 km2 cells experiencing both forest loss and fire. Frequency of fire was lower both before and after forest loss, suggesting that most fire is associated with the forest loss process. On peat soils, fire frequency was a factor 10 to 100 lower in protected areas and natural forest logging concessions compared to oil palm and wood fiber (timber) concessions. Efforts to reduce fire need to address the underlying role of land-use and land-cover change in the occurrence of fire. Increased support for protected areas and natural forest logging concessions and restoration of degraded peatlands may reduce future fire risk. During times of high fire risk, fire suppression resources should be targeted to regions that are experiencing recent forest loss, as these regions are most likely to experience fire.
    Schlagwörter air quality ; conservation areas ; Elaeis guineensis ; fire frequency ; fire suppression ; fires ; forests ; greenhouse gas emissions ; land use and land cover maps ; logging ; peat ; peat soils ; peatlands ; plantations ; risk ; wood fibers ; Indonesia
    Sprache Englisch
    Erscheinungsverlauf 2019-1008
    Erscheinungsort Multidisciplinary Digital Publishing Institute
    Dokumenttyp Artikel
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f10100889
    Datenquelle NAL Katalog (AGRICOLA)

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  6. Artikel ; Online: Assessing costs of Indonesian fires and the benefits of restoring peatland.

    Kiely, L / Spracklen, D V / Arnold, S R / Papargyropoulou, E / Conibear, L / Wiedinmyer, C / Knote, C / Adrianto, H A

    Nature communications

    2021  Band 12, Heft 1, Seite(n) 7044

    Abstract: Deforestation and drainage has made Indonesian peatlands susceptible to burning. Large fires occur regularly, destroying agricultural crops and forest, emitting large amounts of ... ...

    Abstract Deforestation and drainage has made Indonesian peatlands susceptible to burning. Large fires occur regularly, destroying agricultural crops and forest, emitting large amounts of CO
    Sprache Englisch
    Erscheinungsdatum 2021-12-02
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-27353-x
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  7. Artikel ; Online: Industrial concessions, fires and air pollution in Equatorial Asia

    Spracklen, D.V. / Reddington, C.L. / Gaveau, D.L.A.

    2018  

    Schlagwörter fires ; forest fires ; forests ; peatlands ; oil palms ; fire prevention
    Sprache Englisch
    Erscheinungsdatum 2018-07-03T11:02:41Z
    Verlag IOP Publishing
    Erscheinungsland fr
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Buch ; Online: The contribution of fungal spores and bacteria to regional and global aerosol number and ice nucleation immersion freezing rates

    Spracklen, D. V. / Heald, C. L.

    eISSN: 1680-7324

    2014  

    Abstract: Primary biological aerosol particles (PBAPs) may play an important role in aerosol–climate interactions, in particular by affecting ice formation in mixed phase clouds. However, the role of PBAPs is poorly understood because the sources and distribution ... ...

    Abstract Primary biological aerosol particles (PBAPs) may play an important role in aerosol–climate interactions, in particular by affecting ice formation in mixed phase clouds. However, the role of PBAPs is poorly understood because the sources and distribution of PBAPs in the atmosphere are not well quantified. Here we include emissions of fungal spores and bacteria in a global aerosol microphysics model and explore their contribution to concentrations of supermicron particle number, cloud condensation nuclei (CCN) and immersion freezing rates. Simulated surface annual mean concentrations of fungal spores are ~ 2.5 × 10 4 m −3 over continental midlatitudes and 1 × 10 5 m −3 over tropical forests. Simulated surface concentrations of bacteria are 2.5 × 10 4 m −3 over most continental regions and 5 × 10 4 m −3 over grasslands of central Asia and North America. These simulated surface number concentrations of fungal spores and bacteria are broadly in agreement with the limited available observations. We find that fungal spores and bacteria contribute 8 and 5% respectively to simulated continental surface mean supermicron number concentrations, but have very limited impact on CCN concentrations, altering regional concentrations by less than 1%. In agreement with previous global modelling studies, we find that fungal spores and bacteria contribute very little (3 × 10 −3 %, even when we assume upper limits for ice nucleation activity) to global average immersion freezing ice nucleation rates, which are dominated by soot and dust. However, at lower altitudes (400 to 600 hPa), where warmer temperatures mean that soot and dust may not nucleate ice, we find that PBAP controls the immersion freezing ice nucleation rate. This demonstrates that PBAPs can be of regional importance for IN formation, in agreement with case study observations.
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2014-09-02
    Erscheinungsland de
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  9. Buch ; Online: Tropical montane forests are a larger than expected global carbon store

    Spracklen, D. V. / Righelato, R.

    eISSN: 1726-4189

    2014  

    Abstract: Tropical montane forests (TMFs) are recognized for the provision of hydrological services and the protection of biodiversity, but their role in carbon storage is not well understood. We synthesized published observations ( n = 94) of above-ground biomass ...

    Abstract Tropical montane forests (TMFs) are recognized for the provision of hydrological services and the protection of biodiversity, but their role in carbon storage is not well understood. We synthesized published observations ( n = 94) of above-ground biomass (AGB) from forest inventory plots in TMFs (defined here as forests between 23.5° N and 23.5° S with elevations ≥ 1000 m a.s.l.). We found that mean (median) AGB in TMFs is 271 (254) t per hectare of land surface. We demonstrate that AGB declines moderately with both elevation and slope angle but that TMFs store substantial amounts of biomass, both at high elevations (up to 3500 m) and on steep slopes (slope angles of up to 40°). We combined remotely sensed data sets of forest cover with high resolution data of elevation to show that 75% of the global planimetric (horizontal) area of TMF are on steep slopes (slope angles greater than 27°). We used our remote sensed data sets to demonstrate that this prevalence of steep slopes results in the global land surface area of TMF (1.22 million km 2 ) being 40% greater than the planimetric area that is the usual basis for reporting global land surface areas and remotely sensed data. Our study suggests that TMFs are likely to be a greater store of carbon than previously thought, highlighting the need for conservation of the remaining montane forests.
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2014-05-23
    Erscheinungsland de
    Dokumenttyp Buch ; Online
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  10. Artikel ; Online: Implications of tropical cyclones on damage and potential recovery and restoration of logged forests in Vietnam.

    Stas, S M / Spracklen, B D / Willetts, P D / Le, T C / Tran, H D / Le, T T / Ngo, D T / Le, A V / Le, H T / Rutishauser, E / Schwendike, J / Marsham, J H / van Kuijk, M / Jew, E K K / Phillips, O L / Spracklen, D V

    Philosophical transactions of the Royal Society of London. Series B, Biological sciences

    2022  Band 378, Heft 1867, Seite(n) 20210081

    Abstract: Many natural forests in Southeast Asia are degraded following decades of logging. Restoration of these forests is delayed by ongoing logging and tropical cyclones, but the implications for recovery are largely uncertain. We analysed meteorological, ... ...

    Abstract Many natural forests in Southeast Asia are degraded following decades of logging. Restoration of these forests is delayed by ongoing logging and tropical cyclones, but the implications for recovery are largely uncertain. We analysed meteorological, satellite and forest inventory plot data to assess the effect of Typhoon Doksuri, a major tropical cyclone, on the forest landscapes of central Vietnam consisting of natural forests and plantations. We estimated the return period for a cyclone of this intensity to be 40 years. Plantations were almost twice as likely to suffer cyclone damage compared to natural forests. Logged natural forests (9-12 years after cessation of government-licensed logging) were surveyed before and after the storm with 2 years between measurements and remained a small biomass carbon sink (0.1 ± 0.3 Mg C ha
    Mesh-Begriff(e) Forestry ; Cyclonic Storms ; Ecosystem ; Vietnam ; Forests ; Tropical Climate ; Trees ; Conservation of Natural Resources
    Sprache Englisch
    Erscheinungsdatum 2022-11-14
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208382-6
    ISSN 1471-2970 ; 0080-4622 ; 0264-3839 ; 0962-8436
    ISSN (online) 1471-2970
    ISSN 0080-4622 ; 0264-3839 ; 0962-8436
    DOI 10.1098/rstb.2021.0081
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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