Santo Antão is long and wide. The island is of volcanic origin and very mountainous, characterized by two high plateaus and several steep river valleys. The southern part of the island has a desert climate, while the northeast and the higher elevations are semi-arid.
Santo Antão island has a hot desert climate in Sinagoga and Porto Novo and a cold semi-arid climate in Espongeiro. The island features very balanced temperatures year round higher on the slopes to cool highland subtropical steppe climate BskL above 1,000 metres ASL. The average annual temperature on the coast is about, decreasing to some on the highest grounds. There can be remarkably cool weather in the interior with warmer wet season starting in July and ending in December–January with colder dry season starting in December–January and ending in June. The major climate risk, similarly to other Cape Verdean islands, yet much less pronounced in the higher altitudes due to better ability in gaining moisture from clouds, is drought.
History
The island was discovered in 1461 or 1462 by Diogo Afonso, together with the islands of São Vicente and São Nicolau. Settlement of the island started in the first half of the 16th century. The main settlement was Ribeira Grande. Other settlements such as Ponta do Sol, Pombas and Porto Novo developed in the 19th century. In 1732 the Municipality of Santo Antão was created, with its seat in the town Ribeira Grande. In 1867 this was divided into the municipality of Paul and the municipality of Ribeira Grande. These were merged in 1895 into one municipality. The municipalities of Paul and Ribeira Grande were recreated in 1917. The municipality of Porto Novo was created in 1962 when the parishes of São João Baptista and Santo André were separated from the older Municipality of Paul.
Population
In the 1830s, the estimated population of Santo Antão was 24,000.
Economy
Fishing and agriculture are the main industries on the island.
Agriculture
The island's agriculture products include sugar cane, yams, cassava, bananas, mangoes, and grain. The main product on the island is a kind of rum known as grogue. Mills continue to distill grogue in the Paul Valley. Due to its mountainous nature, most of the island's plantations are done in terraces, obviating the use of machinery and requiring immense manual labor. Recently, some experiences using drip irrigation have been taking place in order to mitigate the drought conditions. The exportation of many of the island's agriculture products to other islands has been prohibited for nearly two decades because of the millipede blight, but the quarantine was lifted in 2008.
Tourism
Tourism is becoming one of the most dominant industries on the island. There has been some investment in Rural tourism infrastructures. Hiking, Trekking and Cultural tourism account for most of the touristic offer of this island.
Administrative divisions
The island is divided in three municipalities, which are subdivided into civil parishes:
Paul CV-PA
*Santo António das Pombas
Porto Novo CV-PN
*São João Baptista
*Santo André
Ribeira Grande CV-RG
*Nossa Senhora do Rosário
*Nossa Senhora do Livramento
*Santo Crucifixo
*São Pedro Apóstolo
Nature
Santo Antão has 50 endangered species of flora which has the most number in the nation. Several flora found in the island that are also found in some parts of the archipelago includes Aeonium gorgoneum, Artemisia gorgonum, Campanula jacobaea, the Conyza species of feae, pannosa and varia, Echium stenosiphon, Kickxia webbiana, Lavandula rotundifolia, Limonium braunii, Micromeria forbesii, Sonchus daltonii, Capeverdean navelwort and Verbascum capitis-viridis. Flora found only in the island include Tornabenea insularis and ribeirensis. Santo Antão has different species of birds including the Cape Verde sparrow, reptiles including the Cape Verde wall gecko and insects including the spiderTetragnatha torrensis, the moth Scopula paneliusi and the water bearEchiniscus clavispinosus. The island does not have a lot of animal life comparing to other islands. Along its shores, most of the marine life are within Canal de São Vicente.