Hi Mohammed,

As a very basic explanation we can say that climate change refers to the long-term tendency of climatic variables under global warming. If you plot for instance the max daily temperature in the airport of Sydney for the last 50 years you will see a steady increase. Climate variability, on the other hand, refers to the natural variation of the climatic variables, this variation is due to natural causes like time of the day, season, the presence of thunderstorms, and so on. Again if you plot the scatterplot of hourly temperature in this airport you can see a lot of variation which depends on the time of the day and the season of the year. 

Hope it helps,

Augusto

Hi Mohammed, "Climate change refers to a statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades or longer)". On the other hand, "Climate Variability is defined as variations in the mean state and other statistics of the climate on all temporal and spatial scales, beyond individual weather events". See more information at 

http://www.wmo.int/pages/prog/wcp/ccl/faqs.php

Climate change refers to a statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades or longer). Climate change may be due to natural internal processes or external factors such as persistent changes to the atmosphere or changes in land use. 

Climate Variability is defined as variations in the mean state and other statistics of the climate on all temporal and spatial scales, beyond individual weather events. The term "Climate Variability" is often used to denote deviations of climatic statistics over a given period of time (e.g. a month, season or year) when compared to long-term statistics for the same calendar period. Climate variability is measured by these deviations, which are usually termed anomalies. Variability may be due to natural internal processes within the climate system (internal variability), or to variations in natural or anthropogenic external factors (external variability).

Thank you very much for this clarification.

Climate change refers to a statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades to millennia). Climate change may be due to natural inherent processes or external factors such as prolong changes to the atmosphere or changes in land use which were cause anthropogenically. 

Climate Variability is the variations in the mean state and other statistics of the climate spatially and temporally, usually beyond individual weather statistics. This term "Climate Variability" connote deviations of climatic statistics over a given period of time (e.g. a month, season or year), some scientist are of the opinion that this period can transcend to decades (30 years). Climate variability assessed by these deviations, which are usually termed anomalies. Variability may be due to natural internal processes within the climate system (internal variability), or to variations in natural or anthropogenic external factors (external variability). But climate variability is more affiliated to the internal variability unlike climate change.

Thank you sir,

Your answer is clear.

Cordially.

I would like to thank Mohammed Faci for asking this brilliant question.

I wish to offer simple answer to the question of the difference between climate change and climate variability. To begin with, climate change is the statistical record of a long term adjustment of climate of a place or state over a long period or time of an average of at least 30 years or ,ore.

On the other hand, climate variation is any unusual deviation or change from the normal or mean or average annual climate record or season of a state or a place over several weeks or months from the usual pattern as experienced by the state or a place within the state.

So, climate change is different from climate variability in a very significant way just as weather is significantly different from climate variability. This because,weather is the current atmospheric conditions of the day or of the week which may be characterised by temperature, precipitation or rainfall, sunshine, clouds, winds, or humidity.

Many thanks to Mohammed once again. I wish to rest my case here. Be blessed.

Thank you dear Wilson.

Climate variability is a natural phenomenon while changing it is a serious signal of desertification and hence migrations

Dear Mohammed Faci ,

As far as I know, in a particular study, it can be a situation when individual simulations show some differences (both negative and positive) between periods of time, but these differences are simply represent variability, not climate change. If all simulations agree on an increase or a decrease in your interested variable, it could be a sign of climate change.

Climate change is changes occur within long period while climate variability is changes occur within small period.

Hey Faci,

I just attached a picture and hope it will help you.

Best

Thank you for these clarifications.

Thanks Ian.

Thanks for asking this question. B/c i also need more clarification on the difference between them.

Climate change can also take place faster than people think. It depends on the power in the air. If we continue to pollute and warm up the oceans we can't expect "normal weather" as it was BEFORE we started polluting the air.

Climate variability means changes in climate that occur within smaller timeframes, such as a month, a season or a year. Whereas Climate change- are the changes that occur over a longer period of time, typically over decades or longer.

Climate variability looks at changes that occur within smaller timeframes, such as a month, a season or a year, and climate change considers changes that occur over a longer period of time, typically over decades or longer.

Climate change belongs to those variations that persist for a longer period of time, typically decades or more and Climate variability includes all the variations in the climate that last longer than individual weather events, such as for a month, season, or individual year

climate change for long period of time' 'climate compounds ''

climate variability is smaller period .

• CC: if a place that was once able to grow wheat (e.g. of cool climate crop) is now growing say sorghum (generally a hot climate crop); this is CC; i.e., the climate has been changed permanently; here from cool to hot.
• CV: last year, in my study area, the rain started in early May but this year, the start of rain was too late ( in June). Relative to CC, this is short term fluctuation, and that is CV.
• Important concept: CV and CC could overlap. See picture from @Firdos Khan

Climate variability is typically short term fluctuations, climate cycles and seasonal weather changes. Climate change, on the other hand, is a term that refers to sustained, long-term climate change measured in tens, hundreds, thousands of years on a local, regional and global scale. Climate change, which we are talking about now on the Research Gate discussion forum, in discussions on various internet portals, in thousands of scientific publications, etc., are associated with the global warming process, associated with civilization greenhouse gas emissions, etc., which has been going on for many years since the mid-nineteenth century. . and may lead to a global climate catastrophe, which may still occur in the present twenty-first century.

Greetings,

Dariusz Prokopowicz

Climate variability, the way climate fluctuates yearly above or below a long-term average value.

Climate change, long-term continuous change (increase or decrease) to average weather conditions or the range of weather.

I think this paper could help you;

The physics of climate variability and climate change, July 2020,

That's available on the ResearchGate Server for download.

CC is the climate variables have actually changed permanently in the last 30 years or thereabout while CV is when fluctuation is visibly occurring in these variables in a shorter time frame eg. over a couple of years but has not led to a complete deviation from what obtains hitherto. Please, note that change which is rather permanent as we all know.

Climate change is the changes that occur over a longer period of time, typically over decades or longer. Climate variability is the changes in the climate that occur within a smaller period of time, such as a day, a month, a season, or a year.

Climate variability is measured in a smaller time scale such as months to years, but climate change is measure within the longer tine scale such as from decades to centuries.

Thank you https://www.researchgate.net/profile/Frank-Munyai