Aclimate cycle in the pacific ocean with a global impact on weather patterns is called the cycle begins when warm water in the western tropical pacific ocean shifts eastward along the equator toward the coast of south america. la niña el niño temperature inversion global warming

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen