“ A warming of the eastern tropical Pacific Ocean weakens the Walker Circulation and causes the convective zone of heavy rainfall to move eastward, from the western into the central and eastern tropical Pacific, ” states one reference work.
त्यामुळे पेरू त्याचप्रमाणे पूर्वेच्या इतर भागातील समुद्राच्या पृष्ठभागाचे तापमान वाढते.