{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T00:44:07Z","timestamp":1777337047195,"version":"3.51.4"},"reference-count":43,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2016,4,23]],"date-time":"2016-04-23T00:00:00Z","timestamp":1461369600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"NASA Earth Science Division (MODIS Program)","award":["NNX14AI71G"],"award-info":[{"award-number":["NNX14AI71G"]}]},{"name":"the Aligned Research Program of UC Santa Cruz","award":["TO.030.20.MD.D\/UCSCMCA-14-015"],"award-info":[{"award-number":["TO.030.20.MD.D\/UCSCMCA-14-015"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Amazon forests experienced two severe droughts at the beginning of the 21st century: one in 2005 and the other in 2010. How Amazon forests responded to these droughts is critical for the future of the Earth\u2019s climate system. It is only possible to assess Amazon forests\u2019 response to the droughts in large areal extent through satellite remote sensing. Here, we used the Multi-Angle Implementation of Atmospheric Correction (MAIAC) Moderate Resolution Imaging Spectroradiometer (MODIS) vegetation index (VI) data to assess Amazon forests\u2019 response to droughts, and compared the results with those from the standard (Collection 5 and Collection 6) MODIS VI data. Overall, the MAIAC data reveal more realistic Amazon forests inter-annual greenness dynamics than the standard MODIS data. Our results from the MAIAC data suggest that: (1) the droughts decreased the greenness (i.e., photosynthetic activity) of Amazon forests; (2) the Amazon wet season precipitation reduction induced by El Ni\u00f1o events could also lead to reduced photosynthetic activity of Amazon forests; and (3) in the subsequent year after the water stresses, the greenness of Amazon forests recovered from the preceding decreases. However, as previous research shows droughts cause Amazon forests to reduce investment in tissue maintenance and defense, it is not clear whether the photosynthesis of Amazon forests will continue to recover after future water stresses, because of the accumulated damages caused by the droughts.<\/jats:p>","DOI":"10.3390\/rs8040356","type":"journal-article","created":{"date-parts":[[2016,4,25]],"date-time":"2016-04-25T10:02:36Z","timestamp":1461578556000},"page":"356","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Amazon Forests\u2019 Response to Droughts: A Perspective from the MAIAC Product"],"prefix":"10.3390","volume":"8","author":[{"given":"Jian","family":"Bi","sequence":"first","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ranga","family":"Myneni","sequence":"additional","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexei","family":"Lyapustin","sequence":"additional","affiliation":[{"name":"Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD 20771, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yujie","family":"Wang","sequence":"additional","affiliation":[{"name":"Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD 20771, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taejin","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8079-4079","authenticated-orcid":false,"given":"Chen","family":"Chi","sequence":"additional","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kai","family":"Yan","sequence":"additional","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuri","family":"Knyazikhin","sequence":"additional","affiliation":[{"name":"Department of Earth and Environment, Boston University, Boston, MA 02215, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,4,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1107","DOI":"10.1111\/j.1365-2486.2006.01120.x","article-title":"The regional variation of aboveground live biomass in old-growth Amazonian forests","volume":"12","author":"Malhi","year":"2006","journal-title":"Glob. Chang. Biol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1038\/35041539","article-title":"Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model","volume":"408","author":"Cox","year":"2000","journal-title":"Nature"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1007\/s00704-004-0050-y","article-title":"The role of ecosystem-atmosphere interactions in simulated Amazonian precipitation decrease and forest dieback under global climate warming","volume":"78","author":"Betts","year":"2004","journal-title":"Theor. Appl. Climatol."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Salazar, L.F., Nobre, C.A., and Oyama, M.D. (2007). Climate change consequences on the biome distribution in tropical South America. Geophys. Res. Lett., 34.","DOI":"10.1029\/2007GL029695"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Samanta, A., Ganguly, S., Hashimoto, H., Devadiga, S., Vermote, E., Knyazikhin, Y., Nemani, R.R., and Myneni, R.B. (2010). Amazon forests did not green-up during the 2005 drought. Geophys. Res. Lett., 37.","DOI":"10.1029\/2009GL042154"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Xu, L., Samanta, A., Costa, M.H., Ganguly, S., Nemani, R.R., and Myneni, R.B. (2011). Widespread decline in greenness of Amazonian vegetation due to the 2010 drought. Geophys. Res. Lett., 38.","DOI":"10.1029\/2011GL046824"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"666","DOI":"10.1038\/372666a0","article-title":"The role of deep roots in the hydrological and carbon cycles of Amazonian forests and pastures","volume":"372","author":"Nepstad","year":"1994","journal-title":"Nature"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1038\/ngeo2382","article-title":"Photosynthetic seasonality of global tropical forests constrained by hydroclimate","volume":"8","author":"Guan","year":"2015","journal-title":"Nat. Geosci."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Huete, A.R., Didan, K., Shimabukuro, Y.E., Ratana, P., Saleska, S.R., Hutyra, L.R., Yang, W., Nemani, R.R., and Myneni, R. (2006). Amazon rainforests green-up with sunlight in dry season. Geophys. Res. Lett., 33.","DOI":"10.1029\/2005GL025583"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4820","DOI":"10.1073\/pnas.0611338104","article-title":"Large seasonal swings in leaf area of Amazon rainforests","volume":"104","author":"Myneni","year":"2007","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_11","first-page":"128","article-title":"What drives the seasonality of photosynthesis across the Amazon basin? A cross-site analysis of eddy flux tower measurements from the Brasil flux network","volume":"182","author":"Hutyra","year":"2013","journal-title":"Agric. For. Meteorol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"645","DOI":"10.1002\/2014GB005028","article-title":"Source and sink carbon dynamics and carbon allocation in the Amazon basin","volume":"29","author":"Doughty","year":"2015","journal-title":"Glob. Biogeochem. Cycles"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"064014","DOI":"10.1088\/1748-9326\/10\/6\/064014","article-title":"Sunlight mediated seasonality in canopy structure and photosynthetic activity of Amazonian rainforests","volume":"10","author":"Bi","year":"2015","journal-title":"Environ. Res. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"084005","DOI":"10.1088\/1748-9326\/10\/8\/084005","article-title":"Satellite observation of tropical forest seasonality: Spatial patterns of carbon exchange in Amazonia","volume":"10","author":"Xu","year":"2015","journal-title":"Environ. Res. Lett."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1038\/nature12957","article-title":"Drought sensitivity of Amazonian carbon balance revealed by atmospheric measurements","volume":"506","author":"Gatti","year":"2014","journal-title":"Nature"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1344","DOI":"10.1126\/science.1164033","article-title":"Drought sensitivity of the Amazon rainforest","volume":"323","author":"Phillips","year":"2009","journal-title":"Science"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1038\/nature14213","article-title":"Drought impact on forest carbon dynamics and fluxes in Amazonia","volume":"519","author":"Doughty","year":"2015","journal-title":"Nature"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2259","DOI":"10.1890\/06-1046.1","article-title":"Mortality of large trees and lianas following experimental drought in an Amazon forest","volume":"88","author":"Nepstad","year":"2007","journal-title":"Ecology"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"495","DOI":"10.1175\/2007JCLI1600.1","article-title":"The drought of Amazonia in 2005","volume":"21","author":"Marengo","year":"2008","journal-title":"J. Clim."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"554","DOI":"10.1126\/science.1200807","article-title":"The 2010 Amazon drought","volume":"331","author":"Lewis","year":"2011","journal-title":"Science"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"7546","DOI":"10.1002\/2015GL065252","article-title":"Disruption of hydroecological equilibrium in southwest Amazon mediated by drought","volume":"42","author":"Maeda","year":"2015","journal-title":"Geophys. Res. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1606","DOI":"10.1175\/1520-0493(1987)115<1606:GARSPP>2.0.CO;2","article-title":"Global and regional scale precipitation patterns associated with the El Ni\u00f1o\/Southern Oscillation","volume":"115","author":"Ropelewski","year":"1987","journal-title":"Mon. Weather Rev."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"569","DOI":"10.1111\/j.1469-8137.2010.03310.x","article-title":"Drought impacts on the Amazon forest: The remote sensing perspective","volume":"187","author":"Asner","year":"2010","journal-title":"New Phytol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"481","DOI":"10.1109\/TGRS.1995.8746029","article-title":"The interpretation of spectral vegetation indexes","volume":"33","author":"Myneni","year":"1995","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/S0034-4257(02)00096-2","article-title":"Overview of the radiometric and biophysical performance of the MODIS vegetation indices","volume":"83","author":"Huete","year":"2002","journal-title":"Remote Sens. Environ."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1175\/2012EI440.1","article-title":"Why is remote sensing of Amazon forest greenness so challenging?","volume":"16","author":"Samanta","year":"2012","journal-title":"Earth Interact."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"612","DOI":"10.1126\/science.1146663","article-title":"Amazon forests green-up during 2005 drought","volume":"318","author":"Saleska","year":"2007","journal-title":"Science"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2730","DOI":"10.1080\/01431161.2012.750037","article-title":"Comparison and enhancement of MODIS cloud mask products for Southeast Asia","volume":"34","author":"Leinenkugel","year":"2013","journal-title":"Int. J. Remote Sens."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.rse.2013.10.025","article-title":"Systematic land cover bias in Collection 5 MODIS cloud mask and derived products\u2014A global overview","volume":"141","author":"Wilson","year":"2014","journal-title":"Remote Sens. Environ."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"3495","DOI":"10.3390\/rs5073495","article-title":"Exploring patterns and effects of aerosol quantity flag anomalies in MODIS surface reflectance products in the tropics","volume":"5","author":"Grogan","year":"2013","journal-title":"Remote Sens."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1073\/pnas.1204651110","article-title":"Persistent effects of a severe drought on Amazonian forest canopy","volume":"110","author":"Saatchi","year":"2013","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"L19105","DOI":"10.1029\/2011GL049118","article-title":"Amazon vegetation greenness as measured by satellite sensors over the last decade","volume":"38","author":"Atkinson","year":"2011","journal-title":"Geophys. Res. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Lyapustin, A., Martonchik, J., Wang, Y., Laszlo, I., and Korkin, S. (2011). Multiangle implementation of atmospheric correction (MAIAC): 1. Radiative transfer basis and look-up tables. J. Geophys. Res. Atmos., 116.","DOI":"10.1029\/2010JD014985"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Lyapustin, A., Wang, Y., Laszlo, I., Kahn, R., Korkin, S., Remer, L., Levy, R., and Reid, J. (2011). Multiangle implementation of atmospheric correction (MAIAC): 2. Aerosol algorithm. J. Geophys. Res. Atmos., 116.","DOI":"10.1029\/2010JD014986"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1016\/j.rse.2012.09.002","article-title":"Multi-angle implementation of atmospheric correction for MODIS (MAIAC): 3. Atmospheric correction","volume":"127","author":"Lyapustin","year":"2012","journal-title":"Remote Sens. Environ."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Lyapustin, A., Wang, Y., and Frey, R. (2008). An automatic cloud mask algorithm based on time series of MODIS measurements. J. Geophys. Res. Atmos., 113.","DOI":"10.1029\/2007JD009641"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1016\/j.rse.2012.08.035","article-title":"Remote sensing of tropical ecosystems: Atmospheric correction and cloud masking matter","volume":"127","author":"Hilker","year":"2012","journal-title":"Remote Sens. Environ."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"16041","DOI":"10.1073\/pnas.1404870111","article-title":"Vegetation dynamics and rainfall sensitivity of the Amazon","volume":"111","author":"Hilker","year":"2014","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"4353","DOI":"10.5194\/amt-7-4353-2014","article-title":"Scientific impact of MODIS C5 calibration degradation and C6+ improvements","volume":"7","author":"Lyapustin","year":"2014","journal-title":"Atmos. Meas. Tech."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1016\/j.rse.2009.08.016","article-title":"MODIS Collection 5 global land cover: Algorithm refinements and characterization of new datasets","volume":"114","author":"Friedl","year":"2010","journal-title":"Remote Sens. Environ."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1284","DOI":"10.1175\/1520-0442(1995)008<1284:GPEBOA>2.0.CO;2","article-title":"Global precipitation estimates based on a technique for combining satellite-based estimates, rain gauge analysis, and NWP model precipitation information","volume":"8","author":"Huffman","year":"1995","journal-title":"J. Clim."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/j.rse.2011.12.001","article-title":"Impact of sensor degradation on the MODIS NDVI time series","volume":"119","author":"Wang","year":"2012","journal-title":"Remote Sens. Environ."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1537","DOI":"10.1002\/2014GL059323","article-title":"A GRACE-based water storage deficit approach for hydrological drought characterization","volume":"41","author":"Thomas","year":"2014","journal-title":"Geophys. Res. Lett."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/4\/356\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:22:46Z","timestamp":1760210566000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/8\/4\/356"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,4,23]]},"references-count":43,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2016,4]]}},"alternative-id":["rs8040356"],"URL":"https:\/\/doi.org\/10.3390\/rs8040356","relation":{},"ISSN":["2072-4292"],"issn-type":[{"value":"2072-4292","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,4,23]]}}}