Climate Change in Cambodia and Disaster Risks
Climate of Cambodia
The climatic backdrop for Cambodia during the current climatology, 1991-2020, is drawn from observable, historical data. In order to evaluate future climate scenarios and expected change, information should be used to develop a good understanding of current climatic circumstances. Data for the present climatology can be shown using regional variation, the seasonal cycle, or a time series.
Both yearly and seasonal data can be analyzed. The data display defaults to national-scale aggregation; however, sub-national data aggregations may be obtained by clicking on a sub-national unit within a country. Different historical climates can be chosen from the Time Period dropdown menu.
Climate Change in Cambodia
Climate trends, past, present, and future, must always be understood in the context of naturally occurring variability. Climate variability here, refers to the ways how climate conditions (e.g., temperature and precipitation) “flicker” from year to year within their respective usual “range of variability”. The source of this natural fluctuation might be attributed to the connected atmosphere-ocean-land-ice system’s quasi-random internal variability (as weather variability is drawn out over many years). El Nio-Southern Oscillation variability is a prominent example of a cause in this category.
Additional explanations include the effect of non-human nature’s periodic “forcing” events, such as powerful volcanic eruptions. Several natural elements (internal as well as natural forcing) are listed under “internal climate variability”. This internal climatic fluctuation is constantly there, sometimes more pronounced, sometimes less so. As a result, climatology must be understood as a mean with variability around it. Variability can be quite high from year to year (high latitudes), or it can be very low in a few areas and for certain factors (i.e., temperatures in the tropics).
In contrast to natural variability, anthropogenic greenhouse gas emissions and variations in atmospheric concentrations (i.e., CO2, methane) along with land surface changes and aerosol impose a distinct forcing on the climate system. The hunt for climate change signals attempts to distinguish their impacts from natural background fluctuation. This signal might manifest itself as variations in the amplitude of the variability as well as a systematic trend over time.
Climate change and Risks
Climate trends, past, present, and future, must always be understood in the context of naturally occurring variability. Climate variability here, refers to the ways how climate conditions (e.g., temperature and precipitation) “flicker” from year to year within their respective usual “range of variability”.
The source of this natural fluctuation might be attributed to the connected atmosphere-ocean-land-ice system’s quasi-random internal variability (as weather variability is drawn out over many years). El Nio-Southern Oscillation variability is a prominent example of a cause in this category. Additional explanations include the effect of non-human nature’s periodic “forcing” events, such as powerful volcanic eruptions.
Several natural elements (internal as well as natural forcing) are listed under “internal climate variability”. This internal climatic fluctuation is constantly there, sometimes more pronounced, sometimes less so. As a result, climatology must be understood as a mean with variability around it. Variability can be quite high from year to year (high latitudes), or it can be very low in a few areas and for certain factors (i.e., temperatures in the tropics).
In contrast to natural variability, anthropogenic greenhouse gas emissions and variations in atmospheric concentrations (i.e., CO2, methane) along with land surface changes and aerosol impose a distinct forcing on the climate system.
The hunt for climate change signals attempts to distinguish their impacts from natural background fluctuation. This signal might manifest itself as variations in the amplitude of the variability as well as a systematic trend over time.When (year of major change) a changing climate departs from historical natural variability boundaries, change in respect to emerging patterns gives information. In contrast to the establishment of a (anthropogenically) pushed trend, a period dominated by natural variability (low trend) may be seen.
Climate change and Disaster Risks in Cambodia
Cambodia is one of the more disasterprone countries in Southeast Asia, with periodic floods and droughts. Cambodia’s susceptibility to climate change is connected to its postcivil war, least developed, largely agricultural features, with approximately 80% of the people residing in rural regions. The country’s susceptibility to climatic variability and change is exacerbated by a lack of adaptive capability, weak infrastructure, and limited institutions. Certainly, the government recognizes floods and droughts as major causes of poverty. Over the 20-year period from 1987 to 2007, a series of droughts and floods caused severe loss of life and economic damage.
Coastal Risks
The planet’s systematic warming is directly driving global mean sea level to rise in two ways: (1) melting mountain glaciers and polar ice sheets contribute water to the ocean, and (2) warming of the water in the seas leads to expansion and therefore greater volume. Since 1880, global mean sea level has increased by around 210-240 millimeters (mm), with about a third occurring in the previous two and a half decades. The yearly growth is currently around 3mm each year. Regional variations occurs as a result of natural fluctuation in regional winds and ocean currents, which can last for days, months, or even decades.
Nevertheless, additional variables like as ground uplift (e.g., ongoing rebound from Ice Period glacier weight) or subsidence, changes in water tables owing to water extraction or other water management, and even the impacts of local erosion can all play a role locally.
Increasing sea levels put a strain on not just the physical shoreline, but also on coastal ecosystems. Saltwater incursions have the potential to pollute freshwater aquifers, which support municipal and agricultural water sources as well as natural ecosystems. Because there is a significant lag in achieving an equilibrium, sea level will continue to rise as global temperatures continue to rise.
The size of the increase will be heavily influenced by future carbon dioxide emissions and global warming, and the rate of rise may become more influenced by glacier and ice sheet melting.
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