相关实验视频

Updated: Jul 19, 2025

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

通过土地使用变化,火灾和氧化泥炭分解的二氧化碳排放在婆罗洲

Tomohiro Shiraishi^1,2, Ryuichi Hirata³, Masato Hayashi⁴

¹Earth System Division, National Institute for Environmental Studies (NIES), Ibaraki, 305-8506, Japan. shiraishith@nbu.ac.jp.

Scientific reports

|August 11, 2023

概括

波尔尼奥 - - 波尔尼奥岛是一个小岛.

科学领域:

环境科学环境科学
气候科学气候科学
遥感遥感遥感遥感

背景情况:

婆罗洲的森林和泥炭地储存了大量的木质碳.
农业扩张,火灾和泥炭排水威胁着减缓气候变化的努力.
准确的碳排放估计对于婆罗洲的气候战略至关重要.

研究的目的:

开发一种基于遥感的方法,用于估计婆罗洲的二氧化碳 (CO2) 排放和吸收.
量化土地使用变化,火灾和泥炭分解造成的排放.
评估2001年至2016年期间生物质增长所产生的二氧化碳吸收量.

主要方法:

利用2001年至2016年为婆罗洲的遥感数据.
开发了估计土地利用变化,火灾和泥炭分解造成的二氧化碳排放的方法.
来自生物质增长的量化二氧化碳吸收和验证的土地使用变化绘制准确性 (92.0 ± 1.0%).

主要成果:

观察到每年的净排放量为461.10 ± 436.51 Tg CO2 年−1.1.
土地利用变化主导了2001年至2003年的排放,在2001年达到峰值.
森林和泥炭火灾在特定年份 (2002年,2006年,2009年,2014年,2015年) 显著增加了排放量,与南方振荡指数相关.

结论:

婆罗洲经历了一年净二氧化碳的释放,尽管森林生物质的增长.
土地利用变化和火灾是婆罗洲碳排放的重要驱动因素.
以前的估计可能低估了婆罗洲的净二氧化碳排放量.

更多相关视频

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

Published on: May 16, 2016

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Published on: June 4, 2021

相关概念视频

The Carbon Cycle

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.

The Sulfur Cycle

The Sulfur Cycle

Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...

The Calvin Benson Cycle

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...

Carbon-dioxide Fixation

Carbon-dioxide Fixation

Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...

Threats to Biodiversity

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...