相关实验视频

Updated: Sep 12, 2025

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Published on: November 21, 2015

由于近地表面的温度梯度,增加了海洋的CO2吸收

Daniel J Ford¹, Jamie D Shutler¹, Javier Blanco-Sacristán¹

¹Faculty of Environment, Science and Economy, University of Exeter, Penryn, UK.

Nature geoscience

|August 7, 2025

概括

海洋温度梯度显著影响二氧化碳 (CO2) 吸收. 这项研究提供了第一个现场证据,表明考虑到这些梯度增加了海洋二氧化碳吸收的估计,这对全球碳预算至关重要.

科学领域:

海洋学海洋学海洋学
气候科学气候科学
生物地质化学生物地质化学

背景情况:

海洋每年吸收大约25%的人为二氧化碳 (CO2) 排放量.
当前的全球二氧化碳流量估计往往忽视了海洋表面附近垂直温度梯度的影响.
理论和实验室研究表明,由于CO2溶解度的温度敏感性,温度梯度显著影响空海二氧化碳交换.

研究的目的:

提供现场现场证据,证明垂直温度梯度对空海二氧化碳流的影响.
量化近地表温度梯度对大西洋二氧化碳吸收的影响.
验证现有的模型和关于海洋二氧化碳吸收的理论预测.

主要方法:

在2018年和2019年,直接和间接测量大西洋 (50°N到50°S) 跨度的空海二氧化碳流量.
流量测量的比较,包括和不包括垂直温度梯度数据.
分析直接和间接流量估计之间的差异.

主要成果:

考虑到垂直温度梯度,直接和间接二氧化碳流量测量之间的差异从0.19到0.08 mmol m−2 d−1.1减少.
这种调整意味着大西洋二氧化碳沉降量大约增加7%,相当于~0.03 PgC yr-1.1.
这些发现提供了理论和建模研究的首次实地验证,预测在考虑温度梯度时,海洋二氧化碳吸收增加.

结论:

现场现场数据证实,垂直温度梯度显著影响空海二氧化碳交换.
这项研究表明,由于这些梯度,大西洋二氧化碳沉降的量化增加.
准确的全球碳预算评估需要纳入近地表温度梯度对海洋二氧化碳吸收的影响.

关键词:

碳循环是一个碳循环.海洋化学海洋化学

更多相关视频

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

Author Spotlight: Unraveling the Role of Earthworms in Enhancing Mineral Weathering for CO2 Removal

Author Spotlight: Unraveling the Role of Earthworms in Enhancing Mineral Weathering for CO2 Removal

Published on: November 10, 2023

相关概念视频

Oxygen Transport in the Blood

Oxygen Transport in the Blood

Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...

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 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.

Carbon Dioxide Transport in the Blood

Carbon Dioxide Transport in the Blood

Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...

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...

Isothermal Processes

Isothermal Processes

A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...