The Polar cell is likewise a simple system. Though cool and dry relative to equatorial air, air masses at the 60th parallel are still sufficiently warm and moist to undergo convection and drive a thermal loop. Air circulates within the troposphere, limited vertically by the tropopause at about 8 km.
Good sources of calcium. Good sources of calcium include: 1  milk, cheese and other dairy foods. 2  green leafy vegetables â such as broccoli, cabbage and okra, but not spinach. 3  soya beans.4  tofu. 5  soya drinks with added calcium. 6  nuts. 7  bread and anything made with fortified flour.8  fish where you eat the bones â such as sardines and pilchards.ood sources of calcium. Good sources of calcium include: 1  milk, cheese and other dairy foods. 2  green leafy vegetables â such as broccoli, cabbage and okra, but not spinach. 3  soya beans.
Foods Rich In Calcium. Foods such as milk, cheese and yogurt contain calcium. So do dark leafy vegetables. Kale, turnip greens, broccoli, brussel sprouts and cabbage are rich sources of calcium. Canned fish (with bones), such as salmon, sardines and mackerel are also good choices.Fruits rich in potassium include bananas, apricots, prunes, dates, cantaloupe, watermelon and strawberries.Foods such as salmon, beans, turkey and fish also contain potassium as do peas, greens, spinach and tomatoes. If you are consuming three of these items a day, you are probably getting enough potassium.o do dark leafy vegetables. Kale, turnip greens, broccoli, brussel sprouts and cabbage are rich sources of calcium. Canned fish (with bones), such as salmon, sardines and mackerel are also good choices. Fruits rich in potassium include bananas, apricots, prunes, dates, cantaloupe, watermelon and strawberries.