Abdirahman M Omar
A5039163402- Ocean Acidification Effects and Responses
- Maritime Navigation and Safety
- Maritime Transport Emissions and Efficiency
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Oceanographic and Atmospheric Processes
- Atmospheric Ozone and Climate
- Offshore Engineering and Technologies
- CO2 Sequestration and Geologic Interactions
- Ionosphere and magnetosphere dynamics
- Atmospheric chemistry and aerosols
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Climate Change Policy and Economics
- Carbon Dioxide Capture Technologies
- Climate variability and models
- Oil Spill Detection and Mitigation
- Reservoir Engineering and Simulation Methods
- Water Quality Monitoring Technologies
- Seismic Waves and Analysis
- Geology and Paleoclimatology Research
- Risk and Safety Analysis
- Hydrocarbon exploration and reservoir analysis
NORCE Norwegian Research Centre
2019-2025
Bjerknes Centre for Climate Research
2016-2025
Ministry of Health
2024
University of Twente
2024
University of Southampton
2022
CSIRO Oceans and Atmosphere
2019
Iowa State University
2019
Uni Research (Norway)
2009-2018
University of Bergen
2004-2017
Earth Science Institute of the Slovak Academy of Sciences
2016
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere – “global budget” is important to better understand global cycle, support development climate policies, project future change. Here we describe data sets methodology quantify five major components budget uncertainties. Fossil CO2 (EFF) are based on energy statistics cement production data, while from land use change (ELUC), mainly...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere – “global budget” is important to better understand global cycle, support development climate policies, project future change. Here we describe data sets methodology quantify all major components budget, including uncertainties, based on combination a range data, algorithms, statistics, model estimates interpretation by broad scientific...
Abstract. The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity carbon dioxide) values for the global surface oceans and coastal seas with regular updates. Version 3 SOCAT has 14.7 million from 3646 data sets covering years 1957 to 2014. This latest version an additional 4.6 relative 2 extends record 2011 also significantly increases availability 2005 2013. average approximately 1.2 water per year 2006 2012. Quality documentation improved. A new feature set...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere in a changing climate is critical to better understand global cycle, support development policies, project future change. Here we describe synthesize data sets methodology quantify five major components budget uncertainties. Fossil CO2 (EFOS) are based on energy statistics cement production data, while from land-use change (ELUC), mainly...
Present global warming is amplified in the Arctic and accompanied by unprecedented sea ice decline. Located along main pathway of Atlantic Water entering Arctic, Barents Sea site coupled feedback processes that are important for creating variability entire air‐ice‐ocean system. As warm flows through Sea, it loses heat to atmosphere. Warm periods, like today, associated with high northward transport, reduced cover, surface air temperatures. The cooling inflow creates dense water sinking great...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere is important to better understand global cycle, support development climate policies, project future change. Here we describe data sets a methodology quantify all major components budget, including uncertainties, based on combination range data, algorithms, statistics model estimates interpretation by broad scientific community. We discuss...
Abstract. A well-documented, publicly available, global data set of surface ocean carbon dioxide (CO2) parameters has been called for by international groups nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was initiated the marine science community in 2007 with aim providing a comprehensive, regularly updated, CO2, which had subject to quality control (QC). Many additional data, not yet made public via Carbon Dioxide Information Analysis Center (CDIAC), were retrieved from...
Abstract. The Surface Ocean CO2 Atlas (SOCAT), an activity of the international marine carbon research community, provides access to synthesis and gridded fCO2 (fugacity dioxide) products for surface oceans. Version 2 SOCAT is update previous release (version 1) with more data (increased from 6.3 million 10.1 water values) extended coverage (from 1968–2007 1968–2011). quality control criteria, while identical in both versions, have been applied strictly version than 1. website...
Abstract. As a response to public demand for well-documented, quality controlled, publically available, global surface ocean carbon dioxide (CO2) data set, the international marine science community developed Surface Ocean CO2 Atlas (SOCAT). The first SOCAT product is collection of 6.3 million controlled from oceans and coastal seas, spanning four decades (1968–2007). gridded presented here second come project. Recognizing that some groups may have trouble working with millions measurements,...
Abstract. Here we present monthly, basin-wide maps of the partial pressure carbon dioxide (pCO2) for North Atlantic on a 1° latitude by longitude grid years 2004 through 2006 inclusive. The have been computed using neural network technique which reconstructs non-linear relationships between three biogeochemical parameters and marine pCO2. A self organizing map (SOM) has trained 389 000 triplets SeaWiFS-MODIS chlorophyll-a concentration, NCEP/NCAR reanalysis sea surface temperature, FOAM...
We produced 204 monthly maps of the air–sea CO2 flux in Arctic north 60°N, including Ocean and its adjacent seas, from January 1997 to December 2013 by using a self-organizing map technique. The partial pressure (pCO2) surface water data were obtained shipboard underway measurements or calculated alkalinity total inorganic carbon samples. Subsequently, we investigated basin-wide distribution seasonal interannual variability fluxes. 17-year annual mean shows that all areas seas net sinks....
Abstract. We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60∘ N from 1997 to 2014. This was done by mapping partial pressure surface water (pCO2w) using a self-organizing map (SOM) technique incorporating chlorophyll concentration (Chl a), sea temperature, salinity, ice concentration, atmospheric mixing ratio, geographical position. applied new algorithms for extracting Chl satellite remote sensing reflectance with close examination uncertainty...
Abstract. Due to low calcium carbonate saturation states, and winter mixing that brings anthropogenic carbon the deep ocean, Nordic Seas their cold-water corals are vulnerable ocean acidification. Here, we present a detailed investigation of changes in pH aragonite from preindustrial times 2100, by using situ observations, gridded climatological data, projections for three different future scenarios with Norwegian Earth System Model (NorESM1-ME). During period regular biogeochemistry...
This study evaluates the anthropogenic changes of CO 2 (ΔC ant ) and δ 13 C (Δ in Nordic seas, northern limb Atlantic Meridional Overturning Circulation, that took place between 1981 2002/2003. The have been determined by comparing data obtained during Transient Tracers Ocean, North Study (TTO‐NAS) with seas surveys R/V Knorr 2002 G.O. Sars 2003 using an extended multilinear regression approach. estimated Δ ΔC their relationship to each other water mass distribution suggest Polar Water...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere is important to better understand global cycle, support development climate policies, project future change. Here we describe datasets a methodology quantify all major components budget, including uncertainties, based on combination range data, algorithms, statistics model estimates interpretation by broad scientific community. We discuss...
Abstract Winter data of surface ocean temperature (SST), salinity (SSS) and CO 2 fugacity ( f ) collected on the VOS M/V Nuka Arctica in subpolar North Atlantic between 2004 2017 are used to establish trends, drivers, interannual variability. Over period, waters cooled freshened, increased at a rate similar atmospheric growth rate. When accounting for freshening, inferred increase dissolved inorganic carbon (DIC) was found be approximately twice that expected from alone. This is attributed...
The Surface Ocean CO2 NETwork (SOCONET) and Marine Boundary Layer (MBL) measurements from ships buoys focus on the operational aspects of in both ocean surface atmospheric marine boundary layers. is providing accurate pCO2 data to within 2 micro atmosphere (µatm) for 0.2 parts per million (ppm) MBL following rigorous best practices, calibration intercomparison procedures. Platforms will be tracked near real-time final quality-controlled provided community a year. network involving partners...
[1] A carbon budget for the Nordic Seas is derived by combining recent inorganic data from CARINA database with relevant volume transports. Values of organic in Seas' water masses, amount input river runoff, and removal through sediment burial are taken literature. The largest source to Atlantic Water that enters area across Greenland-Scotland Ridge; this particular true anthropogenic CO2. dense overflows into deep North main sinks Seas. show presently 12.3 ± 1.4 Gt C yr−1 transported 12.5...
Abstract Shelf seas play an important role in the global carbon cycle, absorbing atmospheric dioxide (CO 2 ) and exporting (C) to open ocean sediments. The magnitude of these processes is poorly constrained, because observations are typically interpolated over multiple years. Here, we used 298500 CO fugacity (fCO from a single year (2015), estimate net influx as 26.2 ± 4.7 Tg C yr −1 NW European shelf. atmosphere was dominated by during winter consequence high winds, despite smaller,...
ICOS-Oceans is the marine domain of European Research Infrastructure Consortium "Integrated Carbon Observation System" (ICOS). It aims at delivering high quality greenhouse gas (GHG) observations and derived data products (e.g. regional GHG-flux maps) for constraining GHG balance on a level, sustained long-term basis. currently consists 11 Ship Opportunity lines (SOOP – Program) 10 Fixed Stations (FOS) spread across waters, including North Atlantic Ocean Barents, North, Baltic Mediterranean...
Abstract Organic carbon remineralization rate (OCRR) and the calcium carbonate production (CCPR) are influential variables on efficiency of biological pump (BCP) but not well understood in Red Sea. We used historical cruise data chemistry, oxygen, transient tracers from five locations along north–south central axis Sea to estimate OCRR CCPR tracer‐based water mean ages (Γ), apparent oxygen utilization (AOU), alkalinity (AU). This resulted first basin‐wide depth‐resolving (100–1,000 m)...
Abstract. Data from two Voluntary Observing Ship (VOS) (2005–2007) augmented with data subsets ten cruises (1987–2005) were used to investigate the spatiotemporal variations of CO2 fugacity in seawater (fCO2sw) North Sea at seasonal and inter-annual time scales. The observed fCO2sw related sea surface temperature (SST), biology plus mixing, air-sea exchange. Over study period, amplitude induced by SST changes was 0.4–0.75 times those resulting mixing. Along a meridional transect, normally...
Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore can provide up to 13% of CO2 reduction required achieve Intergovernmental Panel on Climate Change goals. The public must be assured that potential leakages from reservoirs detected therefore safely contained. We conducted controlled release 675 kg within sediments at 120 m water depth, simulate leak test novel detection, quantification attribution approaches. show...