Lake Atitlán

Lake Atitlán ( es, links=no, Lago de Atitlán, ) is a lake in the Guatemalan Highlands of the Sierra Madre mountain range. The lake is located in the Sololá Department of southwestern Guatemala. It is known as the deepest lake in Central America.

Name

Atitlán means "between the waters". In the Nahuatl language, "atl" is the word for water, and "titlan" means between. The "tl" at the end of the word "atl" is dropped (because it is a grammatical suffix) and the words are combined to form "Atitlán".

Geography

The lake has a maximum depth of about and an average depth of . Its surface area is . It is approximately with around of water. Atitlán is technically an endorheic lake, feeding from two nearby rivers and not draining into the ocean. It is shaped by deep surrounding escarpments and three volcanoes on its southern flank. The lake basin is volcanic in origin, filling an enormous caldera formed by a supervolcanic eruption 84,000 years ago. The culture of the towns and villages surrounding Lake Atitlán is influenced by the Maya people. The lake is about west-northwest of Antigua. It should not be confused with the smaller Lake Amatitlán.

Lake Atitlán is renowned as one of the most beautiful lakes in the world, and is one of Guatemala's most important national and international tourist attractions. German explorer and naturalist Alexander von Humboldt called it "the most beautiful lake in the world," and Aldous Huxley famously wrote of it in his 1934 travel book ''Beyond the Mexique Bay'': "Lake Como, it seems to me, touches on the limit of permissibly picturesque, but Atitlán is Como with additional embellishments of several immense volcanoes. It really is too much of a good thing."

The area around San Marcos has particularly tall cliffs abutting the lake and in recent years has become renowned for cliff diving.

Agriculture

The area supports extensive coffee and avocado orchards and a variety of farm crops, most notably corn and onions. Significant agricultural crops include: corn, onions, beans, squash, tomatoes, cucumbers, garlic, chile verde, strawberries and pitahaya fruit. The lake itself is a significant food source for the largely indigenous population.

Geological history

The first volcanic activity in the region occurred about 11 million years ago, and since then the region has seen four separate episodes of volcanic growth and caldera collapse, the most recent of which began about 1.8 million years ago and culminated in the formation of the present caldera. The lake now fills a large part of the caldera, reaching depths of up to .

The caldera-forming eruption is known as Los Chocoyos eruption and ejected up to of tephra. The enormous eruption dispersed ash over an area of some : it has been detected from Florida to Ecuador, and can be used as a stratigraphic marker in both the Pacific and Atlantic oceans (known as Y-8 ash in marine deposits). A ''chocoyo'' is a type of bird which is often found nesting in the relatively soft ash layer.

Since the end of Los Chocoyos, continuing volcanic activity has built three volcanoes in the caldera. Volcán Atitlán lies on the southern rim of the caldera, while Volcán San Pedro and Volcán Tolimán lie within the caldera. San Pedro is the oldest of the three and seems to have stopped erupting about 40,000 years ago. Tolimán began growing after San Pedro stopped erupting and probably remains active, although it has not erupted in historic times. Atitlán has developed almost entirely in the last 10,000 years and remains active, its most recent eruption having occurred in 1853.

On February 4, 1976, a very large earthquake (magnitude 7.5) struck Guatemala, killing more than 26,000 people. The earthquake fractured the lake bed and caused subsurface drainage from the lake, allowing the water level to drop within one month.

Ecological history

In 1955, the area around Lake Atitlán became a national park. The lake was mostly unknown to the rest of the world, and Guatemala was seeking ways to increase tourism and boost the local economy. It was suggested by Pan American World Airways that stocking the lake with a fish prized by anglers would be a way to do just that. As a result, an exotic non-native species, the black bass, was introduced into the lake in 1958. The bass quickly took to its new home and caused a radical change in the species composition of the lake. The predatory bass caused the elimination of more than two-thirds of the native fish species in the lake and contributed to the extinction of the Atitlan grebe, a rare bird that lived only in the vicinity of Lake Atitlán.

A unique aspect of the climate is what is referred to as Xocomil (of the Kaqchickel language meaning "the wind that carried away sin"). This wind is common late morning and afternoon across the lake; it is said to be the encounter of warm winds from Pacific meeting colder winds from the North.

In August 2015 a thick bloom of algae known as Microcystis cyanobacteria re-appeared in Lake Atitlan; the first major occurrence was in 2009. Bureaucratic red tape has been blamed for the lack of action to save the lake. If current activities continue unchecked, the toxification of the lake will make it unsuitable for human use.

Culture

The lake is surrounded by many villages in which Maya culture is still prevalent and traditional dress is worn. The Maya people of Atitlán are predominantly Tz'utujil and Kaqchikel. During the Spanish conquest of the Americas, the Kaqchikel initially allied themselves with the invaders to defeat their historic enemies, the Tz'utujil and K'iche' Maya, but were themselves conquered and subdued when they refused to pay tribute to the Spanish.

Santiago Atitlán is the largest of the lakeside communities, and it is noted for its worship of Maximón, an idol formed by the fusion of traditional Mayan deities, Catholic saints, and conquistador legends. The institutionalized effigy of Maximón is under the control of a local religious brotherhood and resides in various houses of its membership during the course of a year, being most ceremonially moved in a grand procession during Semana Santa. Several towns in Guatemala have similar cults, most notably the cult of San Simón in Zunil

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