Article
Environmental Sciences
Nathan C. Dadap, Alexander R. Cobb, Alison M. Hoyt, Charles F. Harvey, Andrew F. Feldman, Eun-Soon Im, Alexandra G. Konings
Summary: When organic peat soils in Southeast Asian peatlands become dry, they become flammable and can lead to catastrophic fire events. This study used neural networks to model soil moisture and found that future climate change, including reduced precipitation and increased evaporative demand, will decrease soil moisture. This may accelerate peat carbon emissions and suggest that degraded areas with less tree cover are more vulnerable to climate change, highlighting the need for urgent peatland restoration.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Engineering, Environmental
Yakun Zhu, Yifan Xu, Xi Deng, Hoyoung Kwon, Zhangcai Qin
Summary: This study analyzed land use change in Malaysia and Indonesia and modeled its impacts on the GHG emissions of soy biodiesel produced in the United States. The study found that oil palm plantations have more than doubled over 2001-2016 and the area of palm-on-peatlands has expanded 3.7 times. Based on updated data, the contribution of peatland loss to biodiesel emissions is only 40-65% of previous estimates.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Ecology
Dilva Terzano, Fabio Attorre, Faizal Parish, Patrick Moss, Fabrizio Bresciani, Roshan Cooke, Paul Dargusch
Summary: Peatlands in Southeast Asia are crucial for biodiversity and climate regulation, but are under threat from anthropogenic activities. Peatland degradation is a significant source of greenhouse gases in the region. The new community-led 5Rs approach can help support peatland restoration strategies and activities, ensuring ecological restoration goals are met while garnering local community support.
RESTORATION ECOLOGY
(2022)
Review
Environmental Studies
Tri Wira Yuwati, Dony Rachmanadi, Pratiwi, Maman Turjaman, Yonky Indrajaya, Hunggul Yudono Setio Hadi Nugroho, Muhammad Abdul Qirom, Budi Hadi Narendra, Bondan Winarno, Sri Lestari, Purwanto Budi Santosa, Rahardyan Nugroho Adi, Endang Savitri, Pamungkas Buana Putra, Reni Setyo Wahyuningtyas, Retno Prayudyaningsih, Wawan Halwany, Besri Nasrul, Bastoni, Daniel Mendham
Summary: Tropical peatlands in Indonesia are under serious threat due to illegal logging, fire, and land use conversion. Efforts to restore these peatlands have been accelerated by the establishment of the Peatland Restoration Agency and the implementation of the 3Rs policy.
Article
Soil Science
Markus Anda, Sofyan Ritung, Erna Suryani, Sukarman, Muhammad Hikmat, Edi Yatno, Anny Mulyani, Rudi Eko Subandiono, Suratman, Husnain
Summary: A detailed spatial inventory of tropical peatlands in Indonesia was conducted using a standard method protocol from 2013 to 2019, providing the first systematic census of peatlands in Indonesia. Peat depth was classified into six categories, with exceptionally deep peatlands mainly found on Kalimantan and Sumatera Islands.
Article
Oceanography
Yongli Zhou, Moritz Mueller, Nagur Cherukuru, Patrick Martin
Summary: Southeast Asia's peatlands contribute a significant amount of dissolved organic carbon to the coastal ocean. Sunlight can directly remineralize 25% of the peatland-derived organic carbon, but photodegradation alone does not account for the total degradation observed in field data.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Ecology
Mengjie Wang, Qinfeng Guo, Anping Chen
Summary: This study used satellite data to analyze the changes in tropical forests in mainland Southeast Asia. The results showed that during the period from 2000 to 2020, tropical forests gradually transformed into savannahs, and the reasons for this transformation varied in different time periods. In the early period, the increase in savannahs was mainly due to tree regeneration from grasslands, while in the recent period, the degradation of forests was the main cause. This study provides important references for land management and tropical forest protection.
Article
Meteorology & Atmospheric Sciences
Thao Linh Tran, Elizabeth A. Ritchie, Sarah E. Perkins-Kirkpatrick
Summary: The study found that approximately half of the Western North Pacific tropical cyclones make landfall in Southeast Asia, representing over 75% of the total landfalls in the region. While there was a slight upward trend in landfall frequency in the JTWC dataset, the number of landfall events decreased in the CMA and TOKYO datasets over the study period. There was a consistent northward shift in landfall locations over the 50-year period, with decreases in landfalls in the Philippines and Vietnam but increases in some South China areas.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Multidisciplinary Sciences
Rafhiah Kahar, Norhayati Ahmad, Takaomi Arai
Summary: This study investigated three Southeast Asian Cypriniformes fishes found in rainforest streams in Brunei Darussalam. The results showed that these fish species were reproductively active throughout the year and did not exhibit any spawning seasonality associated with environmental factors. The non-seasonal reproductive ecology of tropical cypriniforms suggests an evolutionary adaptation to ensure their survival in an unstable environment and might be affected by climate change scenarios in the future.
SCIENTIFIC REPORTS
(2023)
Article
Biology
Shinya Numata, Koharu Yamaguchi, Masaaki Shimizu, Gen Sakurai, Ayaka Morimoto, Noraliza Alias, Nashatul Zaimah Noor Azman, Tetsuro Hosaka, Akiko Satake
Summary: In this study, we analyzed reproductive phenology in Peninsular Malaysia and found a decrease in the proportion of flowering and fruiting species over the past few decades. We also discovered that species in the Dipterocarpaceae family have flowering responses to both drought and low temperatures, but the availability of low-temperature flowering cues will decrease in the future, leading to reduced flowering opportunities for these species.
COMMUNICATIONS BIOLOGY
(2022)
Article
Environmental Sciences
Xiaohan Zheng, Chao Wang, Yixian Tang, Hong Zhang, Tianyang Li, Lichuan Zou, Shaoyang Guan
Summary: An adaptive high coherence temporal subsets (HCTSs) small baseline subset (SBAS)-InSAR method is proposed in this paper to monitor the degradation of peatlands in Southeast Asia. By capturing the high coherence time range and applying a time-weighted strategy, this method can calculate the deformation results of peatlands more accurately and observe the dynamic changes in deformation rate. The number of measurement points observed by this method is also significantly higher than the traditional SBAS-InSAR method.
Article
Biodiversity Conservation
Antonio Jonay Jovani-Sancho, Patrick O'Reilly, Gusti Anshari, Xin Yi Chong, Neil Crout, Christopher D. D. Evans, Stephanie Evers, Jing Ye Gan, Christopher N. Gibbins, Evi Gusmayanti, Jamaludin Jamaludin, Adi Jaya, Susan Page, Yosep Yosep, Caroline Upton, Paul Wilson, Sofie Sjogersten
Summary: This study aimed to quantify the soil CH4 and N2O fluxes from smallholder agricultural systems in Southeast Asia's tropical peatlands and assess their environmental controls. The results showed that water table depth strongly determined CH4 emissions, while mean total dissolved nitrogen in soil water strongly correlated with N2O emissions. These new emissions data could contribute to the development of more reliable country-level emission factors for national greenhouse gas inventory reporting. Rating: 8/10.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Emma Howard, Simon Thomas, Thomas H. A. Frame, Paula L. M. Gonzalez, John Methven, Oscar Martinez-Alvarado, Steven J. Woolnough
Summary: Two sets of weather patterns in Southeast Asia are presented and compared, showing the ability to capture different modes of tropical circulation variability. The study found that while the patterns can distinguish various climate modes effectively, there are still some modes that are not well captured. The weather patterns show promising potential in extending the useful forecast range for the risk of heavy precipitation.
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
(2022)
Review
Environmental Sciences
Susan Page, Shailendra Mishra, Fahmuddin Agus, Gusti Anshari, Greta Dargie, Stephanie Evers, Jyrki Jauhiainen, Adi Jaya, Antonio Jonay Jovani-Sancho, Ari Lauren, Sofie Sjogersten, Ifo Averti Suspense, Lahiru S. Wijedasa, Chris D. Evans
Summary: This review discusses the biogeochemical characteristics of tropical peatlands and explores the impacts of human activities such as deforestation, fire, drainage, and agriculture on these systems. Tropical peatlands store a significant amount of carbon, but they are increasingly threatened by anthropogenic modifications, which result in carbon loss, increased greenhouse gas emissions, and hydrological disruptions. With a warming climate, these impacts are expected to escalate, posing risks to carbon stocks in disturbed and intact peat swamps.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)
Article
Oceanography
Yongli Zhou, Christopher D. Evans, Yuan Chen, Kristy Y. W. Chang, Patrick Martin
Summary: Southeast Asia is a hotspot of terrigenous organic carbon export to the ocean, with around 10% of global land-to-ocean riverine flux. Research in the central Sunda Shelf reveals a large input of terrigenous dissolved organic carbon (tDOC) during the Southwest Monsoon, leading to seasonal acidification. Isotope mass balance calculations show that 60%-70% of the original tDOC input is remineralized in coastal waters, contributing to CO2 efflux. Additionally, incubation experiments suggest that 30%-40% of tDOC is relatively refractory and may be exported to the open ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Biodiversity Conservation
Mahyar Masoudi, Puay Yok Tan, Soo Chin Liew
ECOLOGICAL INDICATORS
(2019)
Article
Meteorology & Atmospheric Sciences
T. F. Eck, B. N. Holben, D. M. Giles, I Slutsker, A. Sinyuk, J. S. Schafer, A. Smirnov, M. Sorokin, J. S. Reid, A. M. Sayer, N. C. Hsu, Y. R. Shi, R. C. Levy, A. Lyapustin, Muhammad Arif Rahman, Soo-Chin Liew, Santo V. Salinas Cortijo, Tan Li, Daniel Kalbermatter, Kwoh Leong Keong, Muhammad Elifant Yuggotomo, Fanni Aditya, Maznorizan Mohamad, Mastura Mahmud, Tan Kok Chong, Hwee-San Lim, Yeap Eng Choon, Gumilang Deranadyan, Sheila D. A. Kusumaningtyas, Edvin Aldrian
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2019)
Article
Meteorology & Atmospheric Sciences
Srikanth Madala, Santo Salinas, Jukka Miettinen, Jun Wang
METEOROLOGICAL APPLICATIONS
(2020)
Article
Optics
Joel Wong, Soo Chin Liew, Elizabeth Wong
Article
Environmental Sciences
Joel Wong, Soo C. Liew, Elizabeth W-S Wong, Sandric C. Y. Leong
JOURNAL OF APPLIED REMOTE SENSING
(2020)
Article
Ecology
Patrick Martin, Nivedita Sanwlani, Tiffany Wan Qi Lee, Joel Meng Cheng Wong, Kristy Yi Wen Chang, Elizabeth Wing-See Wong, Soo Chin Liew
Summary: This study investigated the seasonal impact of CDOM on light absorption in the Sunda Shelf region of Southeast Asia, showing that CDOM can dominate underwater light absorption and alter the underwater irradiance spectrum, reducing light penetration depth. The results suggest that terrigenous CDOM may contribute to limiting the depth distribution of photosynthetic corals.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Kheng Lim Goh, Soo Chin Liew
Summary: The study investigated the influence of radiographic contrast agent on the accuracy of photon counts in SPECT imaging, using different CT approaches. The BMT/SPECT method showed the smallest error in measuring radionuclide concentration, especially in the contrast agent-filled region.
JOURNAL OF MEDICAL IMAGING
(2021)
Article
Environmental Sciences
Nivedita Sanwlani, Elizabeth Wing-See Wong, Kyle Morgan, Soo Chin Liew, Patrick Martin
Summary: This study assessed light quality and ecological risks in Southeast Asian waters, finding poor light conditions in Sumatran coastal waters and the central Malacca Strait, which may have damaging effects on coastal habitats. A comprehensive ecological risk assessment is recommended for effective management of marine ecosystems.
FRONTIERS IN MARINE SCIENCE
(2022)
Proceedings Paper
Geosciences, Multidisciplinary
Chen Guang Hou, Ken Yoong Lee, Soo Chin Liew, Leong Keong Kwoh
Summary: In this study, a fully automatic persistent scatterer interferometry (PS-InSAR) framework was developed to process large-volume Sentinel-1 data. It utilizes open-source software packages and high-performance computing clusters to reduce processing time and provide visual interfaces for monitoring and analyzing ground deformation.
2022 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2022)
(2022)
Proceedings Paper
Geosciences, Multidisciplinary
Soo Chin Liew
Summary: We propose a new algorithm for retrieving fire temperature and radiative power using the short-wave infrared (SWIR) bands of high resolution satellite sensors. The algorithm overcomes the challenge of large solar input compared to thermal emission from fires by modeling the unknown ground reflectance. The algorithm is evaluated using a synthetic dataset that includes atmospheric effects and shows a high correlation between the retrieved fire temperature and radiative power with the actual values.
2022 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2022)
(2022)
Proceedings Paper
Computer Science, Artificial Intelligence
Joel Wong, Elizabeth Wing-See Wong, Soo Chin Liew, Sandric Chee Yew Leong
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Soo Chin Liew, Joel Wong, Elizabeth Wing-See Wong
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Srikanth Madala, Tan Li, Santo Salinas, Soo Chin Liew
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Proceedings Paper
Computer Science, Artificial Intelligence
Ken Yoong Lee, Chen Guang Hou, Soo Chin Liew, Leong Keong Kwoh
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM
(2020)
Meeting Abstract
Oncology
Peh Yean Cheah, Lai Fun Thean, Kuen Kuen Lam, Soo Chin Liew, Michelle Wong, Nicholas Koh, Michelle Lo, Emile Tan, Choong Leong Tang