<div dir="ltr"><div>Dear GrADS users,</div><div>I have to calculate monsoon onset date (based on onset circulation index OCI,Wang et al. 2009) for my model data.</div><div><div><i>OCI monsoon onset for a particular year is defined as the day when 850-hPa zonal wind averaged over the southern Arabian Sea region exceeds 6.2 m/s with the provision that for the following consecutive 6 days also OCI exceeds 6.2 m/s. </i></div></div><div>I have a file of 36 years containing daily data of 850hPa zonal wind averaged over the required region.</div><div>Could anyone please tell me how to calculate the onset date for each year. It is urgent for my work.</div><div><br></div><div>Thanks in anticipation,</div><div>Anubhav</div><div><br></div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><span style="font-family:arial;font-size:small">Anubhav Choudhary</span><div style="font-family:arial;font-size:small">Ph.D. Student<br>School of Environmental Sciences<br>Jawaharlal Nehru University, New Delhi<div><br>Ph: +91-8527706122<br>Email: <a href="mailto:yoursanubhav@gmail.com" target="_blank">yoursanubhav@gmail.com</a></div></div></div></div></div></div>
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