Abstract
The Amazon basin is the planet’s largest and most intense land-based centre of precipitation. This convective system is driven by high net surface radiation, which is dissipated via fluxes of latent heat and sensible heat. Over the long term (1 year or greater), incoming precipitation over the basin is balanced by evaporative fluxes of water to the atmosphere and discharge, which returns excess water to the oceans. The temporal variability of this cycle is largely controlled by oscillations of tropical Pacific and North Atlantic sea surface temperatures, while synergies between climate and forest structure and functioning control much of the observed spatial variability. Field observations and numerical models indicate that large-scale deforestation has decreased net surface radiation and evapotranspiration, increasing sensible heat flux, water yield, and stream discharge in many locations, particularly in the agricultural frontier of southeastern Amazonia. In the future, increasing atmospheric greenhouse gases are expected to increase temperatures, drought frequency, and drought intensity in the Amazon, causing further changes to the cycling of energy and water in the basin.
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References
Andrade NLR, Aguiar RG, Sanches L, Freitas-Alves ECR, Nogueira JS (2009) Net radiation partition in Amazonian forest and transitional Amazonia-Cerrado forest areas. Rev Bras Meteorol 24(3):346–355. doi:10.1590/S0102-77862009000300008
Aragão LE, Malhi Y, Roman-Cuesta RM, Saatchi S, Anderson LO, Shimabukuro YE (2007) Spatial patterns and fire response of recent Amazonian droughts. Geophys Res Lett 34(7):L07701. doi:10.1029/2006GL028946
Bagley JE, Desai AR, Harding KJ, Snyder PK, Foley JA (2014) Drought and deforestation: has land cover change influenced recent precipitation extremes in the Amazon? J Climate 27:345–361
Berbet MLC, Costa MH (2003) Climate change after tropical deforestation: seasonal variability of surface albedo and its effects on precipitation change. J Climate 16:2099–2104
Betts RA (2004) Global vegetation and climate: self-beneficial effects, climate forcings and climate feedbacks. J Phys IV 121:37–60
Bisht G, Bras RL (2010) Estimation of net radiation from the moderate resolution imaging spectroradiometer over the Continental United States. IEEE Trans Geosci Remote Sens 49(6):2448–2462. doi:10.1109/TGRS.2010.2096227
Bonan GB (2002) Ecological climatology: concepts and applications. Cambridge University Press, Cambridge
Bonan GB, DeFries RS, Coe MT, Ojima DS (2004) Land use and climate. In: Gutman G (ed) Land change science. Kluwer Academic Publishers, Dordrecht, pp 301–314
Botta A, Ramankutty N, Foley JA (2002) Long-term variations of climate and carbon fluxes over the Amazon basin. Geophys Res Lett 29(9). doi:10.1029/2001GL013607
Bounoua L, DeFries R, Collatz GJ, Sellers P, Khan H (2002) Effects of land cover conversion on surface climate. Clim Change 52:29–64
Bruijnzeel L (2004) Hydrological functions of tropical forests: not seeing the soil for the trees? Agric Ecosyst Environ 104:185–228
Butt N, Oliveira PA, Costa MH (2011) Evidence that deforestation affects the onset of the rainy season in Rondonia, Brazil. J Geophys Res 116(D11120):8. doi:10.1029/2010JD015174
Chaves J, Neill C, Germer S, Neto SG, Krusche A, Elsenbeer H (2008) Land management impacts on runoff sources in small Amazon watersheds. Hydrol Process 22(22):1766–1775
Coe MT, Costa MH, Howard EA (2007) Simulating the surface waters of the Amazon River Basin: impacts of new river geomorphic and dynamic flow parameterizations. Hydrol Process 21. doi:10.1002/hyp.6850
Coe MT, Costa MH, Soares-Filho BS (2009) The Influence of historical and potential future deforestation on the stream flow of the Amazon River—land surface processes and atmospheric feedbacks. J Hydrol 369:165–174. doi:10.1016/j.jhydrol.2009.1002.1043
Coe MT, Latrubesse EM, Ferreira ME, Amsler ML (2011) The Effects of deforestation and climate variability on the streamflow of the Araguaia River, Brazil. Biogeochemistry 105:119–131. doi:10.1007/s10533-011-9582-2
Coe M, Marthews TR, Costa MH, Galbraith D, Greenglass N, Acioli H, Levine N, Malhi Y, Moorcroft PR, Nobre Muza M, Powell T, Saleska SR, Solorzano LA, Wang J (2013) Deforestation and climate feedbacks threaten the ecological integrity of south-southeastern Amazonia. Philos Trans R Soc B 368:20120155. doi:10.1098/rstb.2012.0155
Costa MH, Foley JA (1997) Water balance of the Amazon Basin. J Geophys Res 102(D20):23973–23989
Costa MH, Foley JA (2000) Combined effects of deforestation and doubled atmospheric CO2 concentrations on the climate of Amazonia. J Climate 13(1):18–34
Costa MH, Pires GF (2009) Effecs of Amazon and Central Brazil deforestation scenarios on the duration of the dry season in the arc of deforestation. Int J Climatol 30:1970–1979. doi:10.1002/joc.2048
Costa MH, Botta A, Cardille JA (2003) Effects of large-scale changes in land cover on the discharge of the Tocantins River, Southeastern Amazonia. J Hydrol 283:206–217
Costa MH, Yanagi SNM, Souza P, Ribeiro A, Rocha EJP (2007) Climate change in Amazonia caused by soybean cropland expansion, as compared to caused by pastureland expansion. Geophys Res Lett 34:L07706. doi:10.1029/2007GL029271
Costa MH, Biajoli MC, Sanches L, Malhado A, Hutyra LR, da Rocha HR, Aguiar RG, de Araújo AC (2010) Atmospheric versus vegetation controls of Amazonian tropical rain forest evapotranspiration: are the wet and seasonally dry rain forests any different? J Geophys Res Biogeosci 115:2005–2012
Culf AD, Fisch G, Hodnett MG (1995) The albedo of Amazonian forest and ranchland. J Climate 8:1544–1554. doi:10.1175/1520-0442(1995)008<1544:TAOAFA>2.0.CO;2
D’Almeida C, Vorosmarty CJ, Marengo JA, Hurtt GC, Dingman SL, Keim BD (2006) A water balance model to study the hydrological response to different scenarios of deforestation in Amazonia. J Hydrol 331(1–2):125–136
D’Almeida C, Vörösmarty CJ, Hurtt GC, Marengo JA, Dingman SL, Keim BD (2007) The effects of deforestation on the hydrological cycle in Amazonia: a review on scale and resolution. Int J Climatol 27(5):633–647
da Rocha HR, Goulden ML, Miller SD (2004) Seasonality of water and heat fluxes over a tropical forest in eastern Amazonia. Ecol Appl 14:22–32
da Rocha HR, Manzi AO, Cabral OM, Miller SD, Goulden ML, Saleska SR, Coupe NR (2009) Patterns of water and heat flux across a biome gradient from tropical forest to savanna in Brazil. J Geophys Res 114(G00B12):1–8
Davidson EA, de Araújo AC, Artaxo P, Balch JK, Brown IF, Bustamante MMC, Coe MT, DeFries RS, Keller M, Longo M, Munger JW, Schroeder W, Soares-Filho BS, Souza CM Jr, Wofsy SC (2012) The Amazon basin in transition. Nature 481:321–328. doi:10.1038/nature10717
Delire C, Behling P, Coe MT, Foley JA, Jacob R, Kutzbach J, Liu Z, Vavrus S (2001) Simulated response of the atmosphere–ocean system to deforestation in the Indonesian Archipelago. Geophys Res Lett 28(10):2081–2084
Dickinson RE, Henderson-Sellers A (1988) Modelling tropical deforestation: a study of GCM land-surface parametrizations. Q J Roy Meteorol Soc 114:439–462
DiMiceli CM, Carroll ML, Sohlberg RA, Huang C, Hansen MC, Townshend JGR (2011) Annual global automated MODIS vegetation continuous fields (MOD44B) at 250 m spatial resolution for data years beginning day 65, 2000–2010, collection 5 percent tree cover. University of Maryland, College Park, MD
Espinoza JC, Guyot JL, Ronchail J, Cocheneau G, Filizola N, Fraizy P, Labat D, de Oliveira E, Ordoñez JJ, Vauchel P (2009) Contrasting regional discharge evolutions in the Amazon basin (1974–2004). J Hydrol 375:297–311
Fisher JB, Malhi Y, Bonal D, Da Rocha HR, De AraÚJo AC, Gamo M, Goulden ML, Hirano T, Huete AR, Kondo H, Kumagai TO, Loescher HW, Miller S, Nobre AD, Nouvellon Y, Oberbauer SF, Panuthai S, Roupsard O, Saleska S, Tanaka K, Tanaka N, Tu KP, Von Randow C (2009) The land atmosphere water flux in the tropics. Glob Chang Biol 15(11):2694–2714. doi:10.1111/j.1365-2486.2008.01813.x
Foley JA, Botta A, Coe MT, Costa MH (2002) El Nino–southern oscillation and the climate, ecosystems and rivers of Amazonia. Global Biogeochem Cycles 16(4):1132
Gibbs HK, Ruesch AS, Achard F, Clayton MK, Holmgren P, Ramankutty N, Foley JA (2010) Tropical forests were the primary sources of new agricultural land in the 1980s and 1990s. Proc Natl Acad Sci USA 107:16732–16737
Gloor M, Brienen R, Galbraith D, Feldpausch T, Schöngart J, Guyot JL, Espinoza J, Lloyd J, Phillips O (2013) Intensification of the Amazon hydrological cycle over the last two decades. Geophys Res Lett 40:1729–1733
Hasler N, Avissar R (2007) What controls evapotranspiration in the Amazon basin? J Hydrometeorol 8(3):380–395
Hayhoe S, Neill C, McHorney R, Porder S, Lefebvre P, Coe MT, Elsenbeer H, Krusche A (2011) Conversion to soy on the Amazonian agricultural frontier increases streamflow without affecting stormflow dynamics. Glob Chang Biol 17:1821–1833. doi:10.1111/j.1365-2486.2011.02392.x
Holtum JAM, Winter K (2010) Elevated [CO2] and forest vegetation: more a water issue than a carbon issue? Funct Plant Biol 37:694–702
Huffman GJ, Adler RF, Bolvin DT, Gu G, Nelkin EJ, Bowman KP, Hong Y, Stocker EF, Wolff DB (2007) The TRMM multi-satellite precipitation analysis: quasi-global, multi-year, combined-sensor precipitation estimates at fine scale. J Hydrometeorol 8(1):38–55
Huntingford C, Fisher RA, Mercado L, Booth BB, Sitch S, Harris PP, Cox PM, Jones CD, Betts RA, Malhi Y, Harris GR, Collins M, Moorcroft P (2008) Towards quantifying uncertainty in predictions of Amazon “dieback.”. Philos Trans R Soc Lond B 363:1857–1864. doi:10.1098/rstb.2007.0028
IBGE, Brazilian Institute of Geography and Statistics (2015) Municipal agricultural production. Available at http://seriesestatisticas.ibge.gov.br/. Accessed 4 May 2015
INMET, Brazilian Nation Meteorological Institute (2012) Automatic weather station data. Available at http://www.inmet.gov.br/portal/
INPE, Brazilian National Space Agency (2015) PRODES project: satellite monitoring of deforestation in the Brazilian Amazon. Available at http://www.obt.inpe.br/prodes/prodes_1988_2014.htm
IPCC, Intergovernmental Panel on Climate Change (2013) The physical science basis. Contribution of working group I to the fifth assessment report of the Intergovernmental Panel on Climate Change. In: Stocker TF, Qin D, Plattner G-K et al (eds) IPCC climate change 2013. Cambridge University Press, Cambridge and New York, NY, p 1535
Juárez RIN, Hodnett MG, Fu R, Goulden ML, von Randow C (2007) Control of dry season evapotranspiration over the Amazonian forest as inferred from observations at a southern Amazon forest site. J Climate 20:2827–2839
Knox R, Bisht G, Wang J, Bras RL (2011) Precipitation variability over the forest to non-forest transition in southwestern Amazonia. J Climate 24(9):2368–2377. doi:10.1175/2010JCLI3815.1
Lapola DM, Oyama MD, Nobre CA (2009) Exploring the range of climate biome projections for tropical South America: the role of CO2fertilization and seasonality. Global Biogeochem Cycles 23(3). doi:10.1029/2008gb003357
Lathuillière MJ, Johnson MS, Donner SD (2012) Water use by terrestrial ecosystems: temporal variability in rainforest and agricultural contributions to evapotranspiration in Mato Grosso, Brazil. Environ Res Lett 7:24024. doi:10.1088/1748-9326/7/2/024024
Macedo M, Defries R, Morton D, Stickler C, Galford G, Shimabukuro Y (2012) Decoupling of deforestation and soy production in the southern Amazon during the late 2000s. Proc Natl Acad Sci USA 109(4):1341–1346. doi:10.1073/pnas.1111374109
Malhi Y, Pegoraro E, Nobre AD, Pereira MGP, Grace J, Culf AD, Clement R (2002) The water and energy dynamics of a central Amazonian rain forest. J Geophys Res Atmos 107:D20
Malhi Y, Roberts JT, Betts RA, Killeen TJ, Li W, Nobre CA (2008) Climate change, deforestation, and the fate of the Amazon. Science 319(5860):169–172. doi:10.1126/science.1146961
Malhi Y, Aragao LEOC, Galbraith D, Huntingford C, Fisher R, Zelazowski P, Sitch S, McSweeney C, Meir P (2009) Exploring the likelihood and mechanism of a climate-change-induced dieback of the Amazon rainforest. Proc Natl Acad Sci USA. doi:10.1073/pnas.0804619106
Marengo JA (1992) Interannual variability of surface climate in the Amazon basin. Int J Climatol 12:853–863
Marengo JA, Tomasella J (1998) Trends in streamflow and rainfall in tropical South America: Amazonia, eastern Brazil and northwestern Peru. J Geophys Res 103(D2):1775–1783
Marengo JA, Nobre CA, Tomasella J, Oyama MD, Oliveira GS, Oliveira R, Camargo H, Alves LM, Brown IF (2008a) The drought of Amazonia in 2005. J Climate 21:495–516
Marengo JA, Nobre CA, Tomasella J, Cardosa MF, Oyama MD (2008b) Hydro-climate and ecological behaviour of the drought of Amazonia in 2005. Philos Trans R Soc 363(1498):1773–1778
Marengo JA, Tomasella J, Soares WR, Alves LM, Nobre CA (2011a) Extreme climatic events in the Amazon basin. Climatological and hydrological context of recent floods. Theor Appl Climatol. doi:10.1007/s00704-00011-00465-00701
Marengo JA, Tomasella J, Alves LM, Soares WR, Rodriguez DA (2011b) The drought of 2010 in the context of historical droughts in the Amazon region. Geophys Res Lett 38:L12703. doi:10.1029/2011GL047436
McAlpine CA, Etter A, Fearnside PM, Seabrook L, Laurance WF (2009) Increasing world consumption of beef as a driver of regional and global change: a call for policy action based evidence from Queensland (Australia), Colombia and Brazil. Glob Environ Chang 19(1):21–33
Melack JM, Hess LL (2010) Remote sensing of the distribution and extent of wetlands in the Amazon basin. In: Junk WJ, Piedade MTF, Wittmann F, Schöngart J, Parolin P (eds) Amazonian floodplain forests: ecophysiology, biodiversity and sustainable management. Ecological studies, vol 210. Springer, New York, NY, pp 43–60. doi:10.1007/978-90-4818725-6_3
Melack JM, Novo EMLM, Forsberg BR, Piedade MTF, Maurice L (2009) Floodplain ecosystem processes. In: Keller MEA (ed) Amazonia and global change. American Geophysical Union Books, Washington, DC, pp 525–542
Meyfroidt P, Lambin EF (2011) Global forest transition: prospects for an end to deforestation. Annu Rev Environ Resour 36:343–371
Moraes JM, Schuler AE, Dunne T, Figueiredo RO, Victoria RL (2006) Water storage and runoff processes in plinthic soils under forest and pasture in eastern Amazonia. Hydrol Process 20:2509–2526
Mu QZ, Zhao MS, Running SW (2011) Improvements to a MODIS global terrestrial evapotranspiration algorithm. Remote Sens Environ 115:1781–1800
Nepstad DC, Carvalho CJR, Davidson EA, Jipp P, Lefebvre PA, Negreiros GH, da Silva ED, Stone TA, Trumbore SE, Vieira S (1994) The role of deep roots in the hydrological and carbon cycles of Amazonian forests and pastures. Nature 372:666–669
Nepstad DC, Moutinho PRS, Dias-Filho MB, Davidson EA, Cardinot G, Markewitz D, Figueiredo R, Viana N, Lefebvre PA, Ray DG, Chambers JQ, Barros L, Ishida FY, Belk E, Schwalbe K (2002) The effects of rainfall exclusion on canopy processes and biogeochemistry of an Amazon forest. J Geophys Res 107(D20):53-1–53-18
Nepstad DC, Lefebvre PA, Silva UL Jr, Tomasella J, Schlesinger P, Solorzano L, Moutinho PRS, Ray DG (2004) Amazon drought and its implications for forest flammability and tree growth: a basin-wide analysis. Glob Chang Biol 10:704–717
Nobre CA, Sellers PJ, Shukla J (1991) Amazonian deforestation and regional climate change. J Climate 4:957–988
Nobre P, Malagutti M, Urbano DF, Almeida RAF, Giarolla E (2009) Amazon deforestation and climate change in a coupled model simulation. J Climate 22:5686–5697
Oliveira RS, Bezerra L, Davidson EA, Pinto F, Klink CA, Nepstad DC, Moreira A (2005) Deep root function in soil water dynamics in cerrado savannas of central Brazil. Funct Ecol 19:574–581
Oliveira LJC, Costa MH, Soares-Filho BS, Coe MT (2013) Large-scale expansion of agriculture in Amazonia may be a no-win scenario. Environ Res Lett 8:024021. doi:10.1088/1748-9326/8/2/024021
Ometto JP, Aguiar APD, Martinelli LA (2011) Amazon deforestation in Brazil: effects, drivers and challenges. Future Sci 2:575–585
Oyama MD, Nobre CA (2003) A new climate-vegetation equilibrium state for tropical South America. Geophys Res Lett 30(23):2199
Panday PK, Coe MT, Macedo MN, Lefebvre P, Castanho ADA (2015) Deforestation offsets water balance changes due to climate variability in the Xingu River in eastern Amazonia. J Hydrol 523:822–829
Pereira EB, Martins FR, Abreu SL, Ruther R (2006) Brazilian atlas of solar energy. UNEP, São Jose dos Campos
Poveda G, Mesa OJ (1993) Metodologias de Prediccion de la Hidrologia Colombiana Considerando el Evento El Niño-Oscilacion del Sur (ENOS), vol 17, Atmosfera. Sociedad Colombiana de Meteorologia, Bogota
Priante-Filho N, Vourlitis GL, Hayashi MMS, Noguiera JS, Campelo JH Jr, Nunes PC, Sousa LSE, Couto EG, Hoeger W (2004) Comparison of the mass and energy exchange of a pasture and a mature transitional tropical forest of the southern Amazon Basin during a seasonal transition. Glob Chang Biol 10:863–876
Rammig A, Jupp T, Thonicke K, Tietjen B, Heinke J, Ostberg S, Lucht W, Cramer W, Cox P (2010) Estimating the risk of Amazonian forest dieback. New Phytol 187:694–706. doi:10.1111/j.1469-8137.2010.03318.x
Richey JE, Meade RH, Salati E, Devol AH, Nordin CF Jr, dos Santos U (1986) Water discharge and suspended sediment concentrations in the Amazon River: 1982–1984. Water Resour Res 22(5):756–764
Ronchail JG, Cochonneau M, Molinier JL, Guyot AG, de Miranda C, Guimarães V, de Oliveira E (2002) Interannual rainfall variability in the Amazon basin and sea-surface temperatures in the equatorial Pacific and tropical Atlantic Oceans. Int J Climatol 22:1663–1686
Saad SI, da Rocha HR, Silva Dias MAF, Rosolem R (2010) Can the deforestation breeze change the rainfall in Amazonia? A case study for the BR-163 highway region. Earth Interact 14(18):1–25. doi:10.1175/2010EI351.1
Salati E, Nobre CA (1991) Possible climatic impacts of tropical deforestation. Clim Change 19:177–198
Sampaio G, Nobre C, Costa MH, Satyamurty P, Soares-Filho BS, Cardoso M (2007) Regional climate change over eastern Amazonia caused by pasture and soybean cropland expansion. Geophys Res Lett 34:L17709. doi:10.1029/2007GL030612
Shuttleworth WJ (1988) Evaporation from Amazonian forests. Philos Trans R Soc B 233:321–346
Silvério DV, Brando PM, Macedo MN, Beck PSA, Bustamante M, Coe MT (2015) Agricultural expansion dominates climate changes in southeastern Amazonia: the overlooked non-GHG forcing. Environ Res Lett 10:104105. doi:10.1088/1748-9326/10/10/104015
Snyder PK (2010) The influence of tropical deforestation on the northern hemisphere climate by atmospheric teleconnections. Earth Interact 14:1–34. doi:10.1175/2010EI280.1
Soares-Filho B, Nepstad D, Curran L, Cerqueira G, Garcia R, Ramos C, Voll E, McDonald A, Lefebvre P, Schlesinger P, McGrath D (2006) Modelling conservation in the Amazon basin. Nature 440:520–523
Souza PJ, Ribeiro A, da Rocha EJP, Bothelo MDM, Marlisom A, De Sousa L, De Souza EB, Farias JRB (2011) Impacts of soyabean expansion on the Amazon energy balance: a case study. Exp Agric 47(3):553–567
Spracklen DV, Arnold SR, Taylor CM (2012) Observations of increased tropical rainfall preceded by air passage over forests. Nature 489(7415):282–U127. doi:10.1038/nature11390
Stickler CM, Coe MT, Costa MH, Nepstad DC, McGrath DG, Dias LCP, Rodrigues HO, Soares-Filho BS (2013) Dependence of hydropower energy generation on forests in the Amazon Basin at local and regional scales. Proc Natl Acad Sci USA 110(23):9601–9606. doi:10.1073/pnas.1215331110
Trancoso R (2006) Changes in land cover and alterations in the hydrological response of catchments in Amazonia. INPA/UFAM, Brazil, p 139
von Randow C, Manzi AO, Kruijt B, De Oliveira PJ, Zanchi FB, Silva RL, Hodnett MG, Gash JHC, Elbers JA, Waterloo MJ, Cardoso FL, Kabat P (2004) Comparative measurements and seasonal variations in energy and carbon exchange over forest and pasture in South West Amazonia. Theor Appl Climatol 78:5–26. doi:10.1007/s00704-004-0041-z
Walker R, Moore NJ, Arima E, Perz S, Simmons C, Caldas M, Vergara D, Bohrere C (2009) Protecting the Amazon with protected areas. Proc Natl Acad Sci USA 106(26):10582–10586. doi:10.1073/pnas.0806059106
Wang G, Eltahir EAB (2000) Role of vegetation dynamics in enhancing the low frequency variability of the Sahel rainfall. Water Resour Res 36:1013–1021
Zeng N, Neelin JD, Lau K-M, Tucker CJ (1999) Enhancement of interdecadal climate variability in the Sahel by vegetation interaction. Science 286:1537–1540
Zeng N, Yoon J-H, Marengo JA, Subramaniam A, Nobre CA, Mariotti A, Neelin D (2008) Causes and impacts of the 2005 Amazon drought. Environ Res Lett 3. doi:10.1088/1748-9326/1083/1081/014002
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Funding from the US National Aeronautics and Space Administration, the US National Science Foundation, and the Gordon and Betty Moore Foundation has supported much of our research in the Amazon.
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Coe, M.T., Macedo, M.N., Brando, P.M., Lefebvre, P., Panday, P., Silvério, D. (2016). The Hydrology and Energy Balance of the Amazon Basin. In: Nagy, L., Forsberg, B., Artaxo, P. (eds) Interactions Between Biosphere, Atmosphere and Human Land Use in the Amazon Basin. Ecological Studies, vol 227. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49902-3_3
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