Climate change

What is climate change?

Climate change refers to the increasing changes in the measures of climate over a long period of time – including temperature, precipitation and wind patterns. Climate change can be a natural shift, but since the 1800 humans have been the mane cause. Using and burning gas, oil and coal releases a lot of greenhouse gas. Greenhouse gas emission traps the heat of the sun in the atmosphere, raising the temperature on earth. Carbon dioxide and methane are the main gasses that have an influence on the climate change. Climate change refers to changes in weather patterns and growing seasons around the world. It also refers to sea level rise caused by the expansion of warmer seas and melting ice sheets and glaciers.

greenhouse gasses

• atmospheric water vapor ?
• carbon dioxide
• Methane

Global warming

Global warming is the long-term warming of the planet’s overall temperature. Though this warming trend has been going on for a long time, its pace has significantly increased in the last hundred years due to the burning of fossil fuels. Global warming causes climate change.

(Temperature more commonly referred to as Global warming)

Global warming refers to the rise in global temperatures due mainly to the increasing concentrations of greenhouse gases in the atmosphere.

What is precipitation in climate?

Precipitation is any liquid or frozen water that forms in the atmosphere and falls back to the Earth. It comes in many forms, like rain, sleet, and snow. Along with evaporation and condensation, precipitation is one of the three major parts of the global water cycle.

Wind patterns

Typically, climate change conversations focus more on temperature than wind patterns, but that could be changing. Per Energy Monitor, the August 2021 IPCC report argues that in most places, wind speeds will be drastically reduced as a result of climate change.

Climate change impact on animal welfare and wellbeing

Marine life

The global ocean is already experiencing the significant impact of climate change and its accompanying effects. They include air and water temperature warming, seasonal shifts in species, coral bleaching, sea level rise, coastal inundation, coastal erosion, harmful algal blooms, hypoxic (or dead) zones, new marine diseases, loss of marine mammals, changes in levels of precipitation, and fishery declines. In addition, we can expect more extreme weather events (droughts, floods, storms), which affect habitats and species alike.

Ocean acidification

The ocean and ocean life absorbs a large amount of the carbon dioxide that humans release in the air by burning fossil fuels. Because the ocean absorbs the carbon dioxide, the ocean becomes more acidic. Ocean acidification reduces the amount of carbonate, a key building block in seawater. This makes it more difficult for marine organisms, such as coral and some plankton, to form their shells and skeletons, and existing shells may begin to dissolve. The impacts of ocean acidification are not uniform across all species. Some algae and seagrass may benefit from higher CO2 concentrations in the ocean, as they may increase their photosynthetic and growth rates. However, a more acidic environment will harm other marine species such as molluscs, corals and some varieties of plankton (Figure 4). The shells and skeletons of these animals may become less dense or strong. In the case of coral reefs, this may make them more vulnerable to storm damage and slow the recovery rate. Declines in calcification because of the rising acidification of water due to absorbing the carbon dioxide emission (25%-30% of all CO2 emission)

• Ocean moves faster due to increased kinetic energy of ocean current due to the increased wind that is caused by the warmer temperatures due to the climate change.

Rising seawater temperatures

The rising seawater temperatures will cause mass mortalities, harmful algal blooms, decline in kelps beds (kelp is very important for absorbing CO2) and substantial changes in geographic distribution of species. Because the water becomes warmer due to the climate change, a lot of species are migrating further up north for the water to be cold enough to live in. The warm water habitats have increased, while cold water habitats have decreased. More than half of the world’s ocean surface temperature has consistently surpassed the historic extreme heat threshold. These extreme heat waves created by climate change threaten marine ecosystems and threaten their ability to provide resources for coastal communities. The marine heatwaves have affected critical foundation species like coral and seagrass, and the warming waters disrupts the ecological structure. * Shark species (and other species) have to migrate further up north because of the warming waters. Blue crabs are thriving in warm water and no longer have to burrow in the winter to survive, which changes the food chain and ecosystem. The food chain gets disrupted because marine life is shifting towards the poles to stay cool as water becomes warmer. Poleward and deeper distributional shifts. Climate change acts as an additional stress factor for species. Combined with other changes like in their food web, habitats and species distributions, the added stress of climate change and rising water temperatures cause a major shift in the ecosystem. The warming water creates problems for ecosystems and mating. Some species migrate during a season because of the water temperature (example: in the winter, they move south). These species meet their mating partners, or they became essential for the ecosystem. However, with the warmer seawater, these species do not have to move further south because the temperature is warm enough further up north. This can disrupt the ecosystems (in this case) in the souther part of the ocean. One of the main threat to marine biodiversity is habitat degradation due to climate change. The distribution of parasites and pathogens is directly correlated to temperature. The higher the temperature, the higher the transmission rate. Some evidence show the same correlation with virulence.

Hypoxia

What is Hypoxia: Hypoxia is water with low, depleted levels of oxygen. It is often associated with overgrowth of algae that leads to oxygen depletion. Hypoxia happens with water with high levels of nutrients, warmer water and other ecosystems disruptions due to climate change. Hypoxia is created mainly by agriculture nutrients and fertilizers that end up in the water due to rain, wind, storms or water dumping in the ocean from for example our sewage. The occurrence of dead zones is natural, but the occurring of dead zones are enhanced by humans. The warming waters are increasing the dead zones frequency and intensity, which leads to biological desserts in the ocean. The excess nutritions that run off into the water is the primary cause of the increasing of dead zones. Because of this nutrition pollution, Eutrophication happens, which has a negative impact on the aquatic ecosystems. The nutrition pollution fuels harmful algae blooms (HAM) and HAM can create toxins that when consumed by small fish work up the ladder of the food chain and can kill a lot of species, especially higher up the food chain. Beside the toxins, HAM also blocks sunlight, clog fish gills and create dead zones. Especially coastal regions, urban streams and rivers are common location for dead zones. The declining of oxygen in large parts of the ocean has biological and ecological consequences as well as local as globally. The warming water and nutrition pollution reduces growth, increased diseases, behavioural changes. Particularly for fin fish and crustaceans. Agrochemical use and other human activity's leads to rising levels of phosphorus and nitrogen.

Coral reefs

The coral reef is a very important part of the oceans ecosystems. Because of the rising temperatures of the ocean, the coral reef dies off slowly because of coral bleaching, coral diseases and mortality events due to the rising temperature. Research links high level of coral mortality with thermally stressed coral colonies.

Climate change impact on human welfare and wellbeing

• Ocean acidification: Ocean acidification has also an impact on human life beside the impact on marine life. It has a big impact on the food security and especially of Molluscs because they are more vulnerable to acidification. This could have a big impact on the economy as well. Also the coast will get less protected because the marine life that is effected by the acidification also protect the coastal line. This protective function of reefs prevents loss of life, property damage, and erosion. Without this protection, it will cost us a lot more money, which is bad for the economy. Especially long term. It will also have a big impact on tourism that gets attracted by marine life and without the tourist the economy will suffer. There is a limit on how much carbon dioxide the ocean can absorb and the more acidic it becomes the less carbon dioxide the ocean can absorb.

• Extreme weather: The effects of more extreme weather and (tropical) storms will be huge and will occur more frequently. There will be a lot of damage on property's and coastlines, and it will affect human life and the economy.

• The rising sea level: The sea level is rising and flooding will occur more frequently which means a lot of people losing their homes or having a lot of damage on their property and coastline

• Vital fish species such as salmon are migrating to new territories, necessitating better international cooperation to prevent a conflict for when species migrate across the border of countries where the economy depends on fishing. It can have serious conflicts as consequence in different perspectives for human wellbeing: law, policy, economics, oceanography, and ecology.

• Fish have methylmercury which can lead to long term neurocognitive deficits in children that persist into adulthood. The methylmercury has been increased due to increases in seawater temperatures.

References

• EPA Climate change indicator: Precipitations

Sources

• UN about climate change
• National geographic about global warming
• climate about history of glacials and interglacials
• about interglacials an orbit
• causes and effects climate change
• Coast adapt about acidity of sea water
• The Ocean Foundation about ocean and climate change