Abstract The present study investigated the onset and withdrawal dates of the rainy season in Panama by using newly developed, gridded, daily precipitation datasets with a high horizontal resolution of 0.05° based on ground precipitation observations. The onset and withdrawal dates showed very complicated geographical features, although the country of Panama is oriented parallel to latitude lines, and the geographical patterns of the onset and withdrawal dates could simply reflect the latitudinal migration of the intertropical convergence zone, as seen in other regions and countries. An absolu

The climate dynamical controls on rainfall oxygen isotope values ( δ 18 O rain ) are poorly constrained in most areas. In Central America, rainfall variations are associated with sea surface temperature anomalies in the Pacific and Atlantic Oceans, yet the response in δ 18 O rain has not been adequately investigated. Analysis of a 30‐year time series of δ 18 O rain in Panama was used to test the hypothesis that δ 18 O rain variations are forced by anomalies in rainfall and sea surface temperatures (SSTAs) in the bordering tropical oceans. The results show that δ 18 O rain values in Panama are

Panama, officially the Republic of Panama, is a country located at the southern end of Central America in North America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and the Pacific Ocean to the south. Its capital and largest city is Panama City, whose metropolitan area is home to nearly half of the country's over 4 m The… Nearly 500 rivers lace Panama's rugged landscape. Mostly unnavigable, many originate as swift highland streams, meander in valleys, and form coastal deltas. However, the Río Chagres (Chagres River), located in central Panama, is one of the few wide rivers and a source of hydroelectric power. The central part of the river is dammed by the Gatun Dam and forms Gatun Lake, an artificial lake that constitutes part of the Panama Canal. The lake was created by the construction of the Gatun Dam across the Río Chagres between 1907 and 1913. Once… Panama has a tropical climate. Temperatures are uniformly high—as is the relative humidity—and there is little seasonal variation. Diurnal ranges are low; on a typical dry-season day in the capital city, the early morning minimum may be 24 °C (75.2 °F) and the afternoon maximum 30 °C (86.0 °F). The temperature seldom exceeds 32 °C (89.6 °F) for more than a short time. Temperatures on the Pacific side of the isthmus are somewhat lower than on the Caribbean, and breezes tend to rise after dusk in most parts of the country. Temperatures are markedly cooler in the higher parts of the mountain ranges, and frosts occur in the Cordillera de Talamanca in western Panama. Climatic regions are determined less on the basis of temperature than on rainfall, which varies regionally from less than 1,300 millimeters (51.2 in) to more than 3,000 millimeters (118.1 in) per year. Almost all of the rain falls during the rainy season, which is usually from April to December, but varies in length from seven to nine months. In general, rainfall is much heavier on the Caribbean than on the Pacific side of the continental divide, due in part to occasional tropical cyclone activity nearby; Panama lies outside the Main Development Region. The annual average in Panama City is little more than half of that in Colón. Panama is one of three countries in the world to be carbon-negative, meaning that it absorbs more carbon dioxide than it releases into the atmosphere. The others are Bhutan and Suriname. Climate change has a negative impact on Panama, reducing the water level of the Panama Canal, meaning less ships make it through and affecting its economy.

This study elucidated the characteristics of climatological seasonal changes in the diurnal variations of precipitation at four ground stations in the upper Río Chagres basin in the Panama Canal watershed. The seasonal changes differed among the stations, although they are located within an area of only 414 km2. Precipitation peaks in the early afternoon at 1500 local standard time (LST) were observed at all the stations. At Chamon, monthly-mean hourly precipitation at every hour exceeded 0.3 mm h–1 throughout November and December. The occurrence of morning precipitation in January and March