inflation Archives - The India Climate Observatory

Dry tale of ten rain weeks

August 23, 2014 by Climate portal editor Leave a Comment

What a monsoon season is can no longer be judged by the over-simplified sums that assure the country about departures from an ‘average’ and the potential of ‘catching up’ as a season progresses. Since the 2009 drought, the awareness of farmers’ cooperatives and groups about the meteorological products and data available with the only provider of such measurements has grown. What has not grown is the willingness of government agencies on the one hand, and the consuming public on the other, to make similar investments in pursuing such clarity.

The area chart with its jagged stripes is the simplest indicator of the gap between the central government’s sanguine response to a very serious monsoon deficit, and the conditions that our districts have recorded since the first week of June 2014. The chart, based on the Indian Meteorological Department’s weekly district recordings of rainfall, plots 641 of these readings over ten weeks.

Our modified monsoon measure shows the overall trend, and made the case early for state and district level relief.

It is immediately clear that the green stripe (for ‘normal’) has at no point been significantly larger than any one of the other three important stripes, coloured deep red (for ‘scanty’), peach (for ‘deficient’) and blue (for ‘excess’).

In the seventh week of monsoon 2014 (17 to 23 July 2014) the number of districts that recorded normal rainfall for that week was 126, and that is the maximum number that have reported normal rainfall for a week. The next highest number of districts reporting normal for a week is 92, which was for the preceding week (10 to 16 July 2014).

More serious is the district-level reporting for the following three weeks – ending 30 July, 06 August and 13 August – which show the number of districts that reported normal rain for each week was less than 20% of the number of districts that reported deficient, scanty or excess rainfall. It was during this period that central government ministries and agencies did not publicly disclose the widespread monsoon deficiency and which did not act, by alerting the consuming public, to the short and medium term consequences of the monsoon crisis.

The modified monsoon measure (which has been advocated as a method to prime local administrations towards early recognition of the need for relief and remedial action in drought and drought-like conditions) displays to greater effect the glaring imbalance between ‘normals’ and their absence in the districts. In every one of the ten weeks, the light red bar (the ‘deficient 2’ measure, for rainfall of 21% less and lower) dominates.

Otherwise it is the dark blue bar (the ‘excess 2’ measure, for rainfall of 21% more and above) which is next most prominent. This is the clearest signal from a close reading of the district rainfall reportage that volatility in rainfall quantities is the feature most visible throughout monsoon 2014.

The IMD’s running table of the distict rainfall departures confirms this trend for monsoon 2014. In many of the 36 meteorological sub-divisions, weeks of scanty and deficient rainfall are broken by normal or excess rainfall, only to return to scanty and deficient. Taking the districts of Odisha and of western Madhya Pradesh as examples, this volatility can be seen at a glance, and is in concurrence with the overall trends that the modified monsoon measure has been indicating for the last two months.

The IMD’s shaky monsoon math

August 7, 2014 by Climate portal editor Leave a Comment

Over eight weeks of recorded monsoon rain, the district-level data available with the India Meteorological Department (IMD) portrays a picture that is very different from its ‘national’ and ‘regional’ advice about the strength and consistency of rainfall.

In its first weekly briefing on the monsoon of August 2014, IMD said: “For the country as a whole, cumulative rainfall during this year’s monsoon (01 June to 30 July 2014) has so far upto 30 July been 23% below the Long Period Average.” Out of 36 meteorological sub-divisions, said the IMD, the rainfall has been normal over 15 and deficient over 21 sub-divisions.

Readings for each district that has reported rainfall consistently for eight weeks. The columns represent the percentage value of actual rainfall for each district against their normal rainfall for eight weeks.

However, we have compiled a far more realistic reading of the monsoon season so far, from the IMD’s own data. For the 614 individual readings from districts that have regular rainfall readings, we have the following: 86 districts have registered scanty rainfall (-99% to -60%); 281 districts have registered deficient rainfall (-59% to -20%); 200 districts have registered normal rainfall (-19% to +19%); and 47 districts have registered excess rainfall (+20% and more).

Moreover, using our running weekly district-level monsoon meter – the details of which and the reasoning for which you will find in here – we see that there was a substantial dip in the number of districts registering ‘deficient 2’ rainfall, which is less than 21% of the normal and lower, during the seventh week of rain, that is the week of 17 to 23 July. But the general trend returned the following week, 24 to 30 July.

What this means, and the bar chart we have provided to illustrate the 614 individual values leaves us in no doubt, is that 367 out of 614 districts have had meagre rain for eight weeks. This also means that over eight weeks where there should have been rainfall that – as the IMD predicted in early June – would be around 95% of the ‘long period average’, instead three out of five districts have had less than 80% of their usual quota.

Our running weekly district-level monsoon meter to aid governance decisions shows the overall trend has not changed substantially in the last fortnight despite good rains during the seventh monsoon week.

Unfortunately, the press and media – in particular the business and financial media – persist in reporting ‘national’ deficits and whether monsoon 2014 will ‘make up’ the average in the remaining period. This approach must be corrected by the IMD’s departmental divisions as it incorrectly makes popular the notion that total rainfall over a designated number of weeks is the most important monsoon metric (See ‘Why there is no ‘normal’ in our monsoon’). Of course it is not so, as different crops follow their own crop calendars according to the agro-ecological regions they are grown in, and require optimum rain at certain times during their respective crop calendars.

The following examples show why such reporting can be misleading:

From Reuters: “August rains hold the key to India’s major summer crops such as rice, soybean, cane and cotton, after a wet end to July failed to make up fully for a dry start to the four-month monsoon season. A late revival shrank the shortfall in rain to around 10 percent below average in July, the India Meteorological Department’s update showed on Thursday, a sharp improvement from the 43 percent deficit in the first month of the season.”

From Bloomberg: “Monsoon crops are sown from June and harvested from October. The country had less than 40 percent of average rains in the first six weeks of the monsoon season that runs through September. The shortage shrank to 23 percent by end-July. Oilseed planting in India is poised to slump as much as 24 percent to the lowest since 2002 after a weak start to the monsoon.”

From The Hindu: “With the country receiving good rain in July, monsoon deficiency has gone down to 23 percent, the MET department on Friday said. While the monsoon deficiency at the national level in June was 43 per cent, by July end it has come down to 23 per cent. Central India, which saw little rain in June, has by now seen some good rain. It received 402.2 mm of rainfall as compared to expected rainfall of 477.7 mm with a deficiency of 16 per cent, much lesser compared to other parts of the country.”

From Business Standard: “According to the India Meteorological Department (IMD), the rains managed to recoup much of the June losses due to strong revival over the central and western regions, and parts of northern India. Weather officials said the momentum of July would continue till about August 10 and then slacken a bit.”

From Mint: “India’s July rain deficit narrowed to 10% of the long-term average for the month, marking a recovery from the driest June in five years, the India Meteorological Department (IMD) said, as kharif crop sowing picked up in tandem. The shrinking of the rainfall deficit in July comes at a time when policymakers have been concerned about the impact of a below-average monsoon on foodgrain production and inflation. The June-September monsoon accounts for more than 70% of the annual rainfall in India and irrigates crops grown on half the country’s farmlands.”

Why there is no ‘normal’ in our monsoon

July 4, 2014 by Climate portal editor Leave a Comment

The idea of a ‘revival’ of a delayed and weakened monsoon is a misleading one and the country’s earth science agencies must advise against the term being used. In particular, our news media must cease using this term as it implies, incorrectly, that rainfall can be ‘made up’ even though current ‘averages’ are low.

This group of maps of the 2014 monsoon is in three parts. Each part is composed of four separate but linked maps, two each in two rows.
This is how you read each of the three sets: the top left map in a group of four shows the anomaly (in millimetres) of rainfall for the days measured. In this map, ochre yellow and dark browns are regions with the least rain compared to what they should have received, while those shaded in blues have received more than they normally do. The second map, top right, shows the percent of normal rain – light and dark browns being percentages very much lower than normal and greens and blues above.
The lower left map in each group shows the accumulated rainfall for the measured days in millimetres, with green then blue and then orange showing the increasing levels of accumulated rain. In contrast, the lower right map shows the normal cumulative rainfalls for the same period.
As with the group of four maps for the seven day period, the groups for the ten and 30 day rainfall measurement cycles follow the same pattern. In this panel, the seven day period is 26 June to 02 July 2014, the ten day period is 23 June to 02 July 2014 and the 30 day period is 03 June to 02 July 2014.
The maps are by the Climate Prediction Center, NOAA Center for Weather and Climate Prediction, USA.

This is simply not so. A normal monsoon is certainly not one that can statistically be called ‘normal’ on the basis of cumulative rainfall for a region – such as any one of our 36 meteorological sub-divisions – adding up to what is expected over four weeks after a few heavy showers in the last few days have helped tilt the reading from ‘below normal’ to ‘normal’. The three panels of maps alongside convincingly explain why.

Yet senior meteorological department officials, including those at the National Weather Forecasting Centre at the India Meteorological Department, issue statements such as “the monsoon has revived in many parts of central and north India”. This may be meant to assuage the concerns especially of farming and cultivating households, but in fact they only distract from the recognition a continuing climatological crisis urgently needs.

The evidence till now is extremely worrisome. June’s rainfall was 43% below average (a ‘national’ statistic that has no meaning in a district, but which helps in a small way to describe the degree of dryness) and this makes June 2014 the worst first month for recorded rainfall since 2009, a year in which the monsoon was the worst after the dreadful dry of 1972.

Especially given the growing evidence of the effects of climate change in India – from rising sea levels, to increasing meltwater from Himalayan glaciers causing torrents in hilly and mountainous districts, to rising mean temperatures in peninsular and north India – there is reason enough to set aside the usual measures such as the date of what is called ‘the onset of the rains over Kerala’ which is pegged to 01 June, and then a progress of the rain up the peninsula based on patterns of 40, 50 and more years ago. These time-tables no longer stand. [A full resolution set of the maps used here is available as a zip archive (2.68 MB).]

What continues to stand in the food staples calendar is the sowing that takes place in July and August but although there is more cooperation between the official earth sciences agencies and the Ministry of Agriculture, the central government has continues to link, in recent statements, the rising prices of food staples to the probability that these will continue should the monsoon be inadequate – which is what all the indicators are pointing to at this time.

This insistence is a contradiction, for a late and weak monsoon (or even an uneven and heavy monsoon that is statistically ‘normal’) will not help the usual sowing time-table and that is why agricultural contingency plans for every district are readied at the first indication of a wayward monsoon. The role of the central and state governments at times like these is not to blame poor rains for volatile and rising food prices but to help determine crop time-tables that match the circumstances.

By Rahul Goswami

A third dry week of monsoon 2014

June 28, 2014 by Climate portal editor Leave a Comment

05 to 11 June is the first week. 12 to 18 June is the second week. 19 to 25 June is the third week. The bars represent the weeks and are divided by IMD’s rainfall categories, with the length of each category in a bar showing the proportion of that category’s number of districts. The colours used here match those used in IMD’s weekly rainfall map (below) which displays the category-wise rainfall in the 36 meteorological sub-divisions (but not by district).

The IMD weekly rainfall map for 19 to 25 June.

We now have rain data for three complete weeks from the India Meteorological Department (IMD) and for all the districts that have reported the progress of the monsoon.

The overall picture remains grim. In the third week of the monsoon the number of districts that reported normal rains in that week (-19% to +19% of the average) is only 74. No rain (-100%) was reported by 71 districts Scanty rain (-99% to -60%) was reported by 221 districts, deficient rain (-59% to -20%) was reported by 125 districts, excess rain (+20% and more) was reported by 129 districts, and there was no data from 21 districts.

The Department of Agriculture and Cooperation, of the Ministry of Agriculture, has already issued its guidance to states on the contingency plans to be followed for a delayed monsoon. That is why it is important to make available the district-level normals and rainfall departures – the meteorological sub-divisions are too broad for such analysis and are irrelevant to any contingency plans and remedial work.

By end-June, when the IMD updates its outlook for the rest of monsoon 2014, we expect more detailed assessments of the districts to be publicly available – the agromet (agricultural meteorology section) already provides this to the states, with state agriculture departments given the responsibility of ensuring that the advice – which is especially important for farmers to plan the sowing of crop staples – reaches every panchayat.