What is the atmospheric pressure?

It can be said that it is one of the most easily overlooked factors for pressure anglers: the subtle change of pressure is not obvious to people, but it is very sensitive to fish that rely on oxygen in water. The pressure change of 10 Pa may affect our final catch. This is not an alarmist, but the fish will float because of the pressure of 10 Pa! Let's talk about the atmosphere today.

What is the atmospheric pressure?

It can be said that it is one of the most easily overlooked factors for pressure anglers: the subtle change of pressure is not obvious to people, but it is very sensitive to fish that rely on oxygen in water. The pressure change of 10 Pa may affect our final catch. This is not an alarmist, but the fish will float because of the pressure of 10 Pa! Let's talk about the influence of atmospheric pressure on fish today!

The reason is that on March 8, 2020, I went to a raft fishing place in Beijing, and many fishermen in the same trade had a bad harvest and their fish turned over! From this, I guess the air pressure may be around 1000 Pa. Finally, the air pressure was confirmed by friends in the studio as 1006 Pa! My brothers in the studio said I was awesome. Let me guess. Of course, the most important thing is that I am still the crown of the bridge! So I hope to share my fishing experience with you. Let's go!

Why do fish float because of the change of air pressure?

The fish rolled on the water.

First of all, let's not discuss the flowering of silver carp, bighead carp, snakehead and mandarin fish. I'm talking about crucian carp and carp in full bloom!

The content of oxygen in water is about 3% ~ 5%, and most of it is dissolved in water because of atmospheric pressure! So when the air pressure becomes low, the oxygen in the water will overflow, so the oxygen content in the water will decrease, which is also the fundamental reason why fish float under low air pressure! The comfortable air pressure of human beings is about1000 pa ~10/0 pa (taking Beijing as an example). If it is lower than 1000 Pa, it is what we call sultry weather!

Let's take 1000 Pa atmospheric pressure as an example:

If the air pressure exceeds 1000 Pa, if the oxygen content in the water is 4% at this time, the oxygen molecules in the gas will be pressed into the water by the atmospheric pressure when the air pressure rises, so the oxygen content in the water will increase. At this time, it will not only increase the activity of the fish, but also allow the fish to feed at the safe bottom!

Air pressure is lower than 1000 Pa: when the air pressure is reduced, oxygen molecules in water will overflow from the water without air pressure, resulting in the reduction of oxygen content in water! The deeper the water level, the lower the oxygen content, resulting in the lower the oxygen content at the bottom of the water, even lower than the warning line for fish survival! Then fish will naturally breathe in the middle or upper water with high oxygen content, while carp and crucian carp belong to benthic fish. If they get to the dangerous upper level, they will naturally shut up because of nervousness!

Summary: Although the fish itself does not have a high demand for oxygen, it is very sensitive to oxygen content! I breathed some oxygen molecules, some of which were carried away by the air. Say you're not angry!

How to adjust fishing under low pressure?

After understanding the effect of air pressure on fish, let's talk about how to fish when the air pressure is low! Strictly speaking, low-pressure bottom fishing is useless even if it is fairy fishing. How can fish eat at the bottom when they are floating on the water? Have discerning fishermen found the core point? Yes, fish float on the water! So, at this time, we'd better travel or go fishing, and then don't think about protecting it. No way!

Of course, there are fishing situations similar to those I fished on the raft today. The air pressure suddenly dropped while fishing. At this time, the fish will only leave the bottom slightly, and the horse will not rise to the middle and upper layers of the water! When fishing, let the bait reach the bottom quickly, so as to keep the fish underwater! In this case, a small amount of crucian carp or carp will bloom on the water. Pay attention to whether this fishing method is empty when the bird flies low.

Supplement: When we are fishing, besides fishing factors, we also need to pay attention to breaking down frequently. Maybe it's because the fish is off the bottom at this time!

Analysis: The above situation generally only occurs when the water depth is about 4 meters or more. If our fishing depth is only 1.5 meters, we need to consider changing the fishing position.

When our fishing waters are closed waters, such as lakes, kiln pits, river closures, etc., once the air pressure drops, fish will immediately run to the semi-water layer in deep water to live! At this time, we still insist on fishing in shallow water. Air force, that's a matter of minutes!

Summary: Low air pressure is "unconventional" fishing, and there are relatively few ways to deal with it. We don't have to compete with it, but it's good for us office workers to go fishing. So the next section will introduce you to the savior of low pressure: the role of wind!

Savior of low pressure: wind!

As we said above, the biggest influence of air pressure on fish is the proportion of oxygen content in water, so when the air pressure is low, we can fish in the downdraft to offset the influence of air pressure on oxygen content in water! Whether it is spring and summer or rainy autumn, as long as the air pressure is low, we need to go fishing in windy places. The wind will help us increase the oxygen content in the water.

Downward flow: I think when the air pressure is low, downward flow is the first! Not only can many fish swim here with the wind, but also can attract fish to live here because of the increase of oxygen content here! Fishing here is a great challenge for fishermen, and they should always follow the trend from the moment they throw the pole. Of course, if you want to catch it well, this is essential!

Bias wind: in many natural waters, geographical conditions do not allow us to sit directly under the wind! So it doesn't matter whether you shave on the left or the right. At this time we will sit in the middle of the river! Many people say, why not suck backwards at this time? Brother, look at the first sentence. You can't catch fish with a downward current! The purpose of making the middle of the river is to intercept some downwind fish, so that we can gradually gather a large number of fish under the den!

Downwind: If the wind starts to blow on our backs when we are fishing, then we should speed up the frequency and try to keep every fish under the nest. If there is no mouth within one hour after the wind blows, congratulations, you can go home early!

Summary: Recently, there are often some small balls that supply oxygen to fish, and they suddenly bubble after being put into the water! Tell everyone responsibly that basically this thing is useless! Not as effective as bleaching powder! The oxygen content in water can't be increased by some so-called oxygen balls! I will explain this for you in detail in the next article!

Summary: low air pressure does not mean that there are no fish to catch, and high air pressure does not mean that it can be protected! In any case, we need to consider the actual situation and not blindly believe in a certain theory! Just like my motto: nothing is nonsense about fish! I am Conan bait, a fisherman who loves fishing!

What is an atmospheric environment monitoring vehicle?

Environmental monitoring vehicle refers to a van-type "special vehicle" equipped with environmental detection instruments, incubators, workstations, sampling devices and foldable ladders for monitoring and testing the atmosphere and water sources. Most of them are specially produced by the environmental protection department. According to the different monitoring objects and scope, the instruments and equipment are also different, generally there are two types: ordinary type and special type.

Contents of environmental monitoring:

Refers to the activities of environmental monitoring institutions to monitor and measure environmental quality. Environmental monitoring is to monitor and measure the indicators reflecting environmental quality to determine the degree of environmental pollution and environmental quality.

Introduction to environmental monitoring:

Environmental monitoring is the basis of environmental scientific management and environmental law enforcement supervision, and it is also an essential basic work for environmental protection. The core goal of environmental monitoring is to provide data on the present situation and changing trend of environmental quality, judge environmental quality, evaluate current major environmental problems and serve environmental management.

What is the atmospheric pressure @20 19?