The sinking air traps the warm air, which prevents evaporative cooling and causes the trapped air to get hotter. Heat waves can be particularly dangerous - 175 to 200 Americans die from heat in an average summer. Air pollution plays a significant role in the deadly nature of heat waves. Sci...
2. How do heat waves form? 热浪是如何形成的? Heat waves form when high pressure air settleshigh in the air and causes hot air to sink down. The hot air sinking creates a bubble that acts like a seal and trapsheat near the ground. This seal keeps out convection currentsthat form clouds...
"You feel dizzy, you feel lightheaded, and as it progresses, you now start to feel irritable or confused or you may have delirium, you may faint, we may lose consciousness or in extreme situations you may start to seize," she explains. "When dehydration causes seizures, it can lead to ...
Areas of high pressure, like heat domes, have sinking air. This compresses the air on the ground and through compression it heats the air column. In addition, winds are moving downslope from the mountains downward into cities like Seattle and Portland; that downward motion causes heating as we...
B What Causes the World Hunger?World hunger has risen for a third consecutive(连续不断的)year, according to the United Nations' annual food security report.D1 Some 821 million people now face food insecurity(粮食不安全),raising numbers to the same level as almost a decade ago. E 2 It al...
Increasing average temperatures and heat waves are having devasting impacts on human health and well-being but studies of heat impacts and how people adapt
When a large amount of warm air and cold air come together high above the earth, it causes a lot of movement in the air. The cold air moves down while the warm air moves up, which creates something like friction (摩擦). An electric charge builds up in the clouds. The charge gets ...
What causes wind to blow?Thermal ExpansionAll the material like solid, liquid or gases expands on heating, is phenomenon is known as thermal expansion. When we heat a substance its molecule starts vibrating with greater velocities and greater amplitudes due to which the size of the object ...
That said, if the heat causes cancelation of flights or delays, some level of assistance may be offered. Likewise airlines may offer refunds or rescheduling/rerouting options. Depending on who it’s been booked with and what payments have been made, some hotel stays may be cancelable without ...
Rather, it's an ever-climate change A. causes a great loss for people the fault of climate change?growing compendium (概要) of global climate B. has lots of unknown long-term effects Blaming climate change for any single dat a showing consistent, undeniable trends.displace tens of millions ...