平原上空的雷暴，保加利亚 Thunderstorm above the plains, Bulgaria (© Revolu7ion93/Getty Images)

承受压力之下的平原 Plains under pressure

保加利亚，多瑙河平原

在壮阔的天幕下，保加利亚的两大平原展现了国家的农业核心。多瑙河平原横跨北部，起伏的田野与河谷受温带大陆性气候影响，炎热的夏季常催生强烈的雷暴。再往南是上色雷斯平原，地势更低且更温暖，受大陆系统及从爱琴海地区涌入的地中海气流共同影响。在这里，酷暑与马里查河流域的水汽交织，使该地区极易发生剧烈的夏季风暴——正如此刻在图像中平原上空上演的景象。

这两大平原共同构成了保加利亚粮食生产的支柱，映射出一片天气、地理与人类历史紧密相连的土地。

Thunderstorm above the plains, Bulgaria

Located on the eastern Balkan Peninsula, Bulgaria sits at the crossroads of Europe and Asia, where ancient cultures, fertile landscapes, and shifting climates converge.

Under dramatic skies, Bulgaria's two great plains reveal the country's agricultural heart. The Danubian Plain spreads across the north, a rolling landscape of fields and river valleys shaped by a temperate continental climate, where warm summers often fuel powerful thunderstorms. Farther south lies the Upper Thracian Plain, lower and warmer, influenced by continental systems and Mediterranean air masses flowing inward from the Aegean region. Here, hot summers and moisture from the Maritsa River basin combine to make the region especially prone to intense summer storms—like the one unfolding above the plains in this image.

Together, these plains anchor Bulgaria's food production and reflect a land where weather, geography, and human history remain closely linked.

雷暴下的大峡谷国家公园，亚利桑那州 Grand Canyon National Park during a thunderstorm, Arizona (© spkeelin/Getty Images)

天气预报的重要性 The importance of weather prediction

World Meteorological Day

Did you check the weather forecast today? Does it look like rain? Will it turn colder? What's the outlook for the weekend? These may be some of the most frequently asked questions anywhere. Given our reliance on weather prediction, let's tip the rain hat to the world's weather experts on World Meteorological Day, celebrated each March 23 by the United Nation's World Meteorological Organization (WMO).

The 2022 theme for World Meteorological Day is 'Early Warning and Early Action. Hydrometeorological and Climate Information for Disaster Risk Reduction.' That's a mouthful, but it essentially boils down to the importance of predicting high-precipitation weather events and mitigating or preventing the damage caused by them.

Worldwide, floods cause more than $40 billion in damage each year. They're the most common type of natural disaster. In the United States flash floods claim more lives than tornadoes, hurricanes, or lightning. But with accurate predictions and appropriate warning systems, people living in an area likely to flood can know the severity of upcoming threats and plan accordingly. Thanks to the study of hydrometeorology, forecasts can predict the impact days and even weeks in advance. Long-term projections can even give an idea of what's coming several months from now. And we thought that weather app was just to tell us whether or not we'll need an umbrella.

世界气象日

你看过今天的天气预报了吗？看起来要下雨吗？天气会变冷吗？周末的前景如何？这些可能是任何地方最常被问到的问题之一。鉴于我们对天气预报的依赖，让我们在每年3月23日由联合国世界气象组织（WMO）庆祝的世界气象日向世界气象专家致敬。

2022年世界气象日的主题是“预警和早期行动”。减少灾害风险的水文气象和气候信息。”这是一口空话，但本质上可以归结为预测高降水天气事件以及减轻或防止它们造成的损害的重要性。

在世界范围内，洪水每年造成超过400亿美元的损失。它们是最常见的自然灾害类型。在美国，山洪暴发夺走的生命比龙卷风、飓风或闪电还多。但是，有了准确的预测和适当的预警系统，生活在可能发生洪水的地区的人们可以知道即将到来的威胁的严重性，并据此制定计划。由于对水文气象学的研究，预报可以提前几天甚至几周预测影响。长期预测甚至可以给出几个月后的情况。我们以为天气应用程序只是告诉我们是否需要雨伞。