Answer:
Atmospheric pressure decreases with increasing altitude. The standard atmospheric pressure at sea level is approximately 1013.25 millibars. As you go higher in the atmosphere, the pressure decreases.
At an altitude of 1,000 meters (3,280 feet), the atmospheric pressure is typically around 900 millibars. This means that at this altitude, the air pressure is lower than at sea level.
It's important to note that atmospheric pressure can vary due to factors such as weather systems, temperature, and humidity. Therefore, the exact pressure at 1,000 meters can fluctuate. However, as a general guideline, it is commonly around 900 millibars.
Keep in mind that this is just an estimate, and there can be variations depending on local conditions.