Weather Basics Teaching Tip. Our daily weather—warm, sunny, windy, cold, rainy, snowy—is dependent on many factors in the earth's atmosphere.
The atmosphere surrounds Earth, going up for more than 300 miles until it blends in with space. This protective atmosphere has five layers, including the stratosphere, which uses ozone to absorb ultraviolet radiation from the sun before it reaches Earth. The layer closest to Earth is called the troposphere and contains 80% of the gases (such as nitrogen and oxygen) that are in the atmosphere. It also contains water vapor, or water in its gas state (like steam), which can form clouds. The temperature in the troposphere decreases with height, so weather at the top of this layer will be much colder. Weather can change rapidly just from day to day, but we usually notice the biggest changes with each season. - Weather and Climate. The surface measuring networks provide the so called ’in situ’ measured data. 71% of the Earth surface is covered by oceans, quite large parts of the continents are covered by rainforests, ice, deserts, high mountains, where the regular surface observations make difficulties.
Therefore, another type of measurements are requested, the remote sensing methods. Such type of measurements are the satellite and the radar measurements. Recently, revolution goes on in the surface measuring techniques. The number of observers is reducing and the number of automathical weather stations (AWS) is growing. As a consequencies, we have much more data for our different purposes (the most frequent regular manual observations were the hourly measurements, the usual measuring frequency at the AWSs is 10-15 minutes), the measuring techniques changed, and in many case we cannot measure the same meteorological parameter as earlier (for example the sunshine duration).
How Does Climate Change? What Is Climate and Climate Change?
Our weather is always changing and now scientists are discovering that our climate does not stay the same either. Climate, the average weather over a period of many years, differs in regions of the world that receive different amounts of sunlight and have different geographic factors, such as proximity to oceans and altitude. Climates will change if the factors that influence them fluctuate. To change climate on a global scale, either the amount of heat that is let into the system changes, or the amount of heat that is let out of the system changes. For instance, warming climates are either due to increased heat let into the Earth or a decrease in the amount of heat that is let out of the atmosphere. Weather forecasting. Forecast of surface pressures five days into the future for the north Pacific, North America, and north Atlantic ocean.
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a given location. Human beings have attempted to predict the weather informally for millennia, and formally since the nineteenth century. Weather forecasts are made by collecting quantitative data about the current state of the atmosphere on a given place and using scientific understanding of atmospheric processes to project how the atmosphere will evolve on that place. Once an all-human endeavor based mainly upon changes in barometric pressure, current weather conditions, and sky condition, weather forecasting now relies on computer-based models that take many atmospheric factors into account.
History[edit] Ancient forecasting[edit] Ancient weather forecasting methods usually relied on observed patterns of events, also termed pattern recognition. Broadcasts[edit] S National Ocean Service: Education: Professional Development: Oceans. What is the difference between weather and climate?
Weather is the air temperature, cloud cover, precipitation, wind, moisture content, and air pressure at any particular time in any particular place. Weather reflects the prevailing conditions of the air masses overlying the land and seas over the entire globe. Climate is the overall picture of weather during periods of seasons or years. Historical records (including geological and recorded history) show us how the climate of the Earth has changed throughout its history. Earth's Energy Source Links for Teachers | Links for Students. Weather and Climate Basics.
What Is the Difference Between Weather and Climate?
It’s a sweltering midsummer day. “It must be global warming,” mutters someone. But is it the Earth’s changing climate that has made the day so warm? Welcome to Web Weather for Kids.