标签美国下的文章

沃森峰上空的彩虹, 巨人柱国家公园, 亚利桑那州, 美国 Rainbow over Wasson Peak, Saguaro National Park, Arizona, USA (© Frank Staub/Getty Images)

天空无极限 The sky is the limit

沃森峰上空的彩虹, 巨人柱国家公园

您是否曾偶然发现彩虹，并感受到一股幸福感？你是否曾想在雨后捕捉阳光下的七彩奇观？从北欧神话中的众神，到爱尔兰妖精的聚宝盆，彩虹一直被赋予神秘的意义。但除了传说，彩虹背后的科学同样引人入胜，德国物理学家狄奥多里克在1304年给出了第一个合理的解释。他发现，阳光进入雨滴后会发生折射，然后在雨滴内反射，再折射出雨滴。这个过程将光线分解成不同的颜色，形成我们看到的光谱。虽然我们知道 “ROYGBIV”（红、橙、黄、绿、蓝、靛、紫）是彩虹的基本颜色，但彩虹实际上包含了数百万种颜色的渐变混合物。

并非所有彩虹看起来都相同。当第二道较暗且颜色顺序相反的彩虹出现在主彩虹上方时，便形成了双彩虹。今日图片展示了美国亚利桑那州萨瓜罗国家公园瓦森峰上空的一道绚丽彩虹。在干旱少雨的沙漠景观中，仙人掌与岩石山坡构成的背景下，这道彩虹格外醒目，证明了即使在最干燥的土地上，大自然依然能带来惊喜。

National Find a Rainbow Day

Have you ever spotted a rainbow and felt a little lucky? National Find a Rainbow Day, celebrated today, is all about looking to the sky for that magical mix of sun and rain. Nature's color wheel has long been linked to myths and legends, from Norse gods to the Irish leprechaun's pot of gold. But beyond folklore, the science behind rainbows is just as compelling. The first real explanation came from Theodoric of Freiberg, a German physicist, in 1304. He discovered that rainbows form when sunlight enters a raindrop, bends, reflects inside, and then bends again as it exits. This process splits light into its colors, creating the spectrum we see. The classic 'ROYGBIV' (red, orange, yellow, green, blue, indigo, and violet) doesn't tell the whole story—rainbows contain millions of colors blended together.

Not all rainbows look the same. Double rainbows occur when a fainter, reversed arc appears above the main one. Moonbows happen at night when moonlight refracts through water droplets. The rare supernumerary rainbow features extra pastel bands inside the primary arc. Today's image features a rainbow over Wasson Peak in Saguaro National Park, Arizona. Against a backdrop of desert cacti and rocky slopes, the vibrant arc stands out in a place where rain is scarce, proving that even the driest landscapes can surprise you.

凯恩维尔附近荒地的砂岩地层, 犹他州, 美国 Sandstone formations in the badlands near Caineville, Utah (© Chris Moore/TANDEM Stills + Motion)

时间的波浪 Waves of time

凯恩维尔附近荒地的砂岩地层, 犹他州, 美国

蜿蜒起伏的砂岩脊绵延于犹他州凯恩维尔荒地，宛如大自然在石头上绘制的笔触。这些地貌由细粒沉积物构成，最初沉积在古代河流三角洲和内陆海洋中，随后逐渐硬化为岩石。随着时间的推移，侵蚀作用穿透了这些地层，露出流动般的波纹状图案。沉积岩层记录着气候变迁和古老地貌的演变。今日图片中，这片荒凉的土地看似毫无生机，但在早春时节，降雨会让大地铺满紫色和黄色的小花。一天的不同时刻，光影不断变化，展现出不同的角度与风貌，为摄影师和游客提供了丰富的观赏体验。尽管这片崎岖不平的地形大部分仍然保持原始状态，但部分区域地势较为平缓，允许游客在无需剧烈攀爬的情况下轻松探索。

荒地广布于除南极洲以外的所有大陆。早期探险者在穿越这些艰难地形时遭遇重重困难，因此赋予它们“荒地”之名。古生物学家经常能在这里发现史前生物的化石遗骸。尽管环境极端，这些土地依然孕育着丰富的生命，包括沙漠植物、蜥蜴和鸟类。

Sandstone formations in the badlands near Caineville, Utah

Wavy sandstone ridges stretch across the Caineville Badlands in Utah, resembling nature's brushstrokes on stone. These formations are made of fine-grained sediment that settled in ancient river deltas and inland seas and later hardened into stone. Over time, erosion carved through the layers, exposing flowing, ripple-like patterns. The sedimentary layers tell a story of shifting climates and ancient landscapes. The barren land may appear lifeless, but during early spring, rainfall causes the terrain to be blanketed with tiny purple and yellow flowers. While much of the terrain remains rugged, some areas offer easy access, allowing visitors to explore without strenuous hiking.

Badlands exist on every continent except Antarctica. Early explorers named them after struggling to navigate harsh terrains. Fossil hunters frequently uncover remnants of prehistoric creatures in the eroded hills. Despite the extreme conditions, badlands support a wide range of life, including desert plants, lizards, and birds.

卡里佐平原国家纪念碑的超级花期，加利福尼亚州，美国 Superbloom in Carrizo Plain National Monument, California (© Robb Hirsch/TANDEM Stills + Motion)

花海绽放 Burst of blooms

卡里佐平原国家纪念碑的超级花期，加利福尼亚州

在沙漠地区，大片花朵绽放的景象并不常见，但在超级花海期间，原本干旱的土地将被无尽的花田覆盖。这种罕见的自然现象发生在美国加利福尼亚州和亚利桑那州，当雨季来临，沉睡在土壤中的野花种子被唤醒，形成壮观的花海景观。加利福尼亚州的超级花海通常每十年出现一次，然而21 世纪持续的干旱使其愈发罕见。超级花海不仅展示了加州丰富的植物多样性，还吸引游客前来观赏，短暂地促进当地经济发展。今日图片中的卡里佐平原国家纪念碑正是观赏这一壮观景象的最佳地点之一。这片广阔的封闭型草原位于加利福尼亚州圣路易斯奥比斯波县东南部，全长约50英里，宽约15英里。坦布洛山脉和卡连特山脉的山丘，以及苏打湖附近的谷地，都会变成一片五彩斑斓的野花拼图，绚丽至极。你曾有幸见过超级花海吗？

Superbloom in Carrizo Plain National Monument, California

It's not every day you see a desert burst into colors, but during a superbloom, arid land is covered with endless stretches of flowers. This rare phenomenon happens in California and Arizona when the rainy season awakens wildflower seeds that have been lying dormant in the soil. Superblooms in California typically occur once a decade, but prolonged droughts in the 21st century have made them increasingly less frequent. Drawing attention to California's diverse flora and rural federal lands, these events offer temporary boosts to local economies.

One of the best spots to witness this spectacular phenomenon is Carrizo Plain National Monument, seen in today's image of a superbloom in 2017. A vast enclosed grassland in southeastern San Luis Obispo County, California, this spot is approximately 50 miles long and 15 miles wide. Here, the hills of the Temblor and Caliente Ranges, along with the valley floor near Soda Lake, transform into a patchwork of colorful wildflowers when conditions are right. Have you ever had the chance to see a superbloom?

鲍曼附近日落时分的闪电和风暴云，内布拉斯加州，美国 Lightning and storm clouds at sunset near Bowman, Nebraska (© john finney photography/Getty Images)

雷鸣不可阻挡 You can't silence thunder

世界气象日

今天，我们庆祝世界气象日，这一纪念日旨在纪念1950年世界气象组织的成立。每年的世界气象日都会关注一个重要的全球气象议题。2025 年的主题“携手缩小预警差距”，强调及时的天气预警和早期行动对于减少灾害损失的重要性。

今日图片中展示了令人叹为观止的爬行闪电，拍摄于美国内布拉斯加州。该州以龙卷风和雷暴而闻名，尤其是在春季和夏季最为频繁。爬行闪电是一种水平移动的树状闪电，在夜空中划出壮丽的光影，彰显大自然的磅礴力量。内布拉斯加州独特的地理环境，包括广阔的大平原和频繁的雷暴，使其成为这种壮观气象现象的高发地。得益于世界气象组织在气象学领域的进步，我们如今可以更精准地预测和应对这些极端天气事件，保护生命与财产安全。

World Meteorological Day

Today, we celebrate World Meteorological Day, commemorating the founding of the World Meteorological Organization (WMO) in 1950. For the annual event, the WMO places emphasis on a different pressing topic each year. The slogan of 2025, 'Closing the early warning gap together,' highlights the importance of timely weather alerts and early action.

Pictured here is awe-inspiring anvil crawler lightning in Nebraska, a state renowned for its tornadoes and thunderstorms, typically during spring and summer. Anvil crawlers are tree-like lightning discharges that move horizontally. Nebraska's location in the Great Plains makes it a hotspot for storm activity. Thanks to the WMO's advancements in meteorology, we can better predict and respond to these dramatic weather events, safeguarding lives and property.

红色岩层，塞多纳，亚利桑那州，美国 Red rock formations, Sedona, Arizona (© Jim Ekstrand/Alamy Stock Photo)

漩涡般的心境 A vortex state of mind

红岩，塞多纳，亚利桑那州

亚利桑那州的塞多纳是一片融合自然奇观、历史遗产与灵性体验的土地。这里坐落着壮丽的红色砂岩地貌，其火红的岩层属于施内布利山地层，由古代海洋沉积物形成，历经数百万年的地质变迁。风化与侵蚀塑造出塞多纳今日的壮观景观，使其在日出和日落时分更显绚丽夺目。这里的威尔逊山、七圣池和大教堂岩等地标，以其奇特的岩层和迷人的景致，吸引着无数游客。

然而，塞多纳不仅仅是一座地质奇观，它还承载着丰富的历史文化。美洲原住民部落曾在此定居，留下了令人惊叹的岩画、悬崖居所和印第安村落，例如蒙特祖马城堡和图齐谷国家纪念地。今天的塞多纳不仅仅是徒步旅行者的天堂，还因其能量漩涡而闻名。这些被认为具有神秘能量的地点，吸引着寻求身心疗愈的游客。这些地区的特征是扭曲生长的杜松树，以及令人屏息的壮丽景观，为塞多纳增添了一种神秘色彩。无论是徒步旅行、探索古老遗迹，还是体验灵性疗愈，塞多纳都能提供独一无二的体验。来到这里，不仅是欣赏风景，更是感受自然与心灵的奇迹！

Rock formations at Sedona, Arizona

Sedona, Arizona, is a place where nature, history, and spirituality converge amidst stunning red rock formations. These fiery sandstone creations, part of the Schnebly Hill Formation, were shaped over millions of years during the Permian Period as sediment accumulated in an ancient sea. Over time, erosion has further sculpted Sedona's landscapes, which now glow brilliantly at sunrise and sunset. Notable formations such as Wilson Mountain, Seven Sacred Pools, and Cathedral Rock offer iconic views.

Sedona isn't just a geological wonder; it's also steeped in history. Native American people have called this region home for millennia. Without any written history, most of the information about the earliest settlers comes from the archaeological ruins that remain, including rock art, cliff dwellings, and pueblos such as Montezuma Castle and Tuzigoot. Visitors can also experience Sedona's renowned energy vortexes—spiritual sites said to promote healing and balance. These areas, marked by twisted juniper trees and breathtaking views, add a mystical dimension to Sedona's allure.

沙漠大角羊，内华达州火焰谷州立公园，美国 Desert bighorn sheep in Valley of Fire State Park, Nevada (© Rachid Dahnoun/Cavan Images)

岩石间的生存之道 Rocky relationship

火焰谷州立公园的沙漠大角羊

沙漠中的大角羊是大自然的登山高手，它们能轻松攀爬悬崖，优雅穿行于崎岖的岩石地形。作为北美的原生物种，大角羊以其独特的卷曲羊角闻名，羊角重量可达30磅。雄羊会用巨大的羊角进行激烈的撞角较量，在这些对决中，它们能以每小时20英里的速度相互冲撞。相比之下，雌羊更加低调，通常会与幼崽组成小群体。大角羊适应了沙漠环境，能长时间不饮水，主要依靠植物中的水分生存。

今日图片中的火焰谷州立公园，是内华达州观赏这些沙漠居民的最佳地点之一。公园因其在阳光下宛如燃烧的红色砂岩地貌而得名。除了壮丽的自然景观，公园还承载着重要的历史意义，其中保存着古代原住民留下的岩画。此外，它因在流行文化中的地位而广为人知，例如电影《星际迷航：世代交替》的部分场景便是在此取景。游览此地时，不妨留意周围的岩石露头，或许会发现一只大角羊正在静静地注视着你。

Desert bighorn sheep in Valley of Fire State Park, Nevada

Nature's desert navigators—desert bighorn sheep—are a marvel to watch, effortlessly scaling cliffs and navigating rocky terrains with grace. Native to North America, these sheep are known for their distinctive curled horns, which can weigh up to 30 pounds. Rams use their massive horns in intense head-butting contests. During these battles, they hurl themselves at each other in charges of up to 20 miles per hour. Ewes, on the other hand, tend to keep things more low-key, forming smaller groups with their lambs. Adapted to the desert environment, the desert bighorn sheep sub-species can go long periods without water, relying on moisture from plants to survive.

Valley of Fire State Park, seen in today's image, is one of the best spots in Nevada to observe these desert dwellers. This park is named for its fiery red sandstone formations that seem to glow under the sun. Beyond its natural beauty, the park holds deep historical significance, with petroglyphs left by ancient Indigenous peoples. It has also earned a place in pop culture as a filming location for scenes from 'Star Trek Generations.' Keep an eye on the rocky outcrops during your visit—you might spot a bighorn sheep observing you.

砂岩石柱，布莱斯峡谷国家公园，犹他州，美国 Sandstone hoodoos, Bryce Canyon National Park, Utah (© Stephen Matera/TANDEM Stills + Motion)

风蚀石们的问候 Hoodoo you do?

布莱斯峡谷 国家公园，犹他州，美国

在美国犹他州，布莱斯峡谷国家公园以其壮观的砂岩迷宫和独特的岩柱景观闻名于世。这里的历史可追溯至少10,000年前，曾是阿纳齐族人、普韦布洛人和派尤特人的家园。公园里的岩柱是由侵蚀作用形成的高耸岩石尖塔，在派尤特部落的创世神话中占据重要地位。根据传说，这些岩柱曾是“传说中的人”，因狡猾的郊狼施下的诅咒而化为石头。

18世纪末至19世纪初，首批欧洲裔美国人抵达这一地区，并在1850年代开始定居。布莱斯峡谷的名字源自埃比尼泽·布莱斯这一位早期定居者，他在峡谷附近拥有一块土地。1928 年的今天，布莱斯峡谷正式被指定为国家公园。如今，该公园以岩柱闻名，每年吸引超过 200 万游客前来欣赏这一地质奇观。事实上，布莱斯峡谷国家公园拥有地球上最密集的岩柱群，为游客提供了一场视觉盛宴。

Anniversary of Bryce Canyon National Park

A breathtaking maze of sandstone formations and awe-inspiring views awaits you at Bryce Canyon National Park in Utah. People have lived in this area for at least 10,000 years, including the Anasazi, Pueblo, and Paiute Peoples. The hoodoos—tall, thin spires of rock formed by erosion—in the park inspired Paiute mythology: They believed them to be the Legend People turned to stone by the trickster Coyote.

The first European Americans arrived in the area in the late 18th and early 19th centuries, and some eventually settled there in the 1850s. Bryce Canyon was named after Ebenezer Bryce, who had a homestead nearby. On this date in 1928, Bryce was declared a national park. These days, the park is famous for its hoodoos. Every year, over 2 million visitors come to marvel at these geological formations. In fact, Bryce Canyon National Park has the highest concentration of hoodoos anywhere on Earth.

向辉煌迈进 Bending towards brilliance

圣路易斯的大拱门，密苏里州

今天，我们庆祝圣路易斯市密苏里州拱门国家公园成立周年纪念日，该公园于2018 年2月22日正式设立，坐落在风景如画的密西西比河沿岸，旨在纪念托马斯·杰斐逊提出的“大陆国家”构想。公园的核心是圣路易斯拱门，这座令人惊叹的630英尺高的建筑已成为圣路易斯的终极象征。拱门采用不锈钢建造，是世界上最高的拱门，也是密苏里州最高的可进入建筑。芬兰裔美国建筑师埃罗·沙里宁于1947年构思出这一设计，并在1965年10月28日正式落成，实现了他的愿景。这座拱门的未来主义设计长期以来被视为汽车时代的象征，代表着现代都市景观与技术进步带来的未来希望。

Gateway Arch in St. Louis, Missouri

Today we are celebrating the anniversary of Gateway National Park, which was established on February 22, 2018, in St. Louis, Missouri. The park, which lies along a picturesque stretch of the Mississippi River, commemorates Thomas Jefferson’s idea of a continental nation. At its heart stands the Gateway Arch, a breathtaking 630-foot-tall structure that has become the ultimate symbol of St. Louis. Constructed of stainless steel, it holds the distinction of being the world's tallest arch and Missouri's tallest accessible structure. Finnish American architect Eero Saarinen dreamed up the design back in 1947, and by October 28, 1965, his vision had been brought to life. The arch's futuristic design has long been viewed as a symbol of the automobile era, representing the modern, urban landscape, and the promise of a technologically advanced future.

值得深思的高地 A point worth pondering

阿尔斯特罗姆角，鲍威尔湖

如果你向往壮丽的日落和令人惊叹的美景，不妨来到阿尔斯特罗姆角。阿尔斯特罗姆角位于犹他州南部凯恩县的格伦峡谷国家休闲区，海拔达4685英尺。阿尔斯特罗姆角主要由恩特拉达砂岩构成，与附近的罗马纳梅萨主峰及东侧的冈赛特山共享相同的地质起源。

作为鲍威尔湖地区的一部分，阿尔斯特罗姆角向南延伸至湖泊辽阔水域，位于帕德雷湾与沃姆溪湾之间。湖水蓄满时，阿尔斯特罗姆角高出水面近1000英尺，可俯瞰周围峡谷。鲍威尔湖横跨犹他州与亚利桑那州，每年吸引约300万游客前来。这片湖泊由深蓝色水流组成迷宫般的网络，蜿蜒穿过90多个岩石峡谷。湖泊的主要部分流经格伦峡谷，同时延伸至多个较小支流峡谷，以及埃斯卡兰特河与圣胡安河区域。

Alstrom Point, Lake Powell, Utah

If you're chasing sunsets and jaw-dropping views, come to Alstrom Point. Located in southern Utah's Kane County, this spot in the Glen Canyon National Recreation Area stands at an impressive height of 4,685 feet. Made mostly of Entrada Sandstone, it has the same geological roots as nearby sites like Romana Mesa, its parent peak, and Gunsight Butte, another sandstone summit to the east.

Part of the Lake Powell region, Alstrom Point extends southward into the vast waters of the lake, in between Padre Bay and Warm Creek Bay. When the lake is full, Alstrom Point towers nearly 1,000 feet above the water, offering views of the surrounding canyons. Lake Powell, spanning across Utah and Arizona, attracts around 3 million visitors every year. The lake is a maze of deep blue water winding through over 90 rock canyons. While its main stretch runs through Glen Canyon, it also snakes into over many smaller side canyons, along with the Escalante and San Juan Rivers.

激发你的好奇心 Peaked your curiosity

琐罗亚斯德神庙，大峡谷国家公园，亚利桑那州

大峡谷的岩层记录了地球近20亿年的历史，这些岩层由科罗拉多河长期侵蚀形成。尽管地质学家对大峡谷的形成过程仍存在一些争议，但最新研究表明，科罗拉多河大约在500万到600万年前开始在这一地区开凿出河道。从那时起，这条河流不断加深和拓宽峡谷，最终塑造出如今壮观的地质奇观。

如今，大峡谷不仅是一条宏伟的峡谷，更是壮丽景观的象征。这里还拥有许多令人惊叹的地质奇观，比如今日图片中的琐罗亚斯德神庙。这座高达7123英尺的山峰位于亚利桑那州科科尼诺县。其名称取自古代伊朗先知琐罗亚斯德，由美国摄影师乔治·沃顿·詹姆斯和地质学家克拉伦斯·达顿命名。1958年9月，里克·蒂德里克和戴夫·甘奇首次成功登顶琐罗亚斯德神庙。这一壮举不仅成为大峡谷首例技术性攀登，也激发了登山者对顶峰的热情，将这里变成热门攀登胜地。

Zoroaster Temple, Grand Canyon National Park, Arizona

Carved by the Colorado River, nearly 2 billion years of Earth's history are exposed in the layers of the Grand Canyon. While geologists continue to debate parts of the formation story of the canyon, recent studies suggest the river carved its path through the region about 5 to 6 million years ago. Since then, the river has been deepening and widening the canyon while sculpting its dramatic geographic features.

Today, the Grand Canyon is much more than just a massive chasm with exceptional vistas. It's home to some stunning geographic features, like Zoroaster Temple, featured in today's image. This towering 7,123-foot summit is in Coconino County, Arizona. The peak was named after the ancient Iranian prophet Zoroaster by George Wharton James, an American photographer and journalist, and Clarence Dutton, an American geologist. Rick Tidrick and Dave Ganci made the first summit ascent of Zoroaster Temple in September 1958. This triumph marked the Grand Canyon's first technical climb, turning it into a hotspot and igniting a wave of summit-chasing climbers.

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